What is NULL in PHP ? - PHP Null Function - Null in PHP - Wikitechy<\/title>\n<meta name=\"description\" content=\"What is NULL in PHP ? - In PHP null () function is an inbuilt function which is used to find whether a variable is NULL or not.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.wikitechy.com\/interview-questions\/php\/what-is-null-in-php\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"What is NULL in PHP ? - PHP Null Function - Null in PHP - Wikitechy\" \/>\n<meta property=\"og:description\" content=\"What is NULL in PHP ? - In PHP null () function is an inbuilt function which is used to find whether a variable is NULL or not.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.wikitechy.com\/interview-questions\/php\/what-is-null-in-php\/\" \/>\n<meta property=\"og:site_name\" content=\"Wikitechy\" \/>\n<meta property=\"article:published_time\" content=\"2022-08-02T12:16:39+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/www.wikitechy.com\/interview-questions\/wp-content\/uploads\/2022\/08\/null-value-in-php.png\" \/>\n<meta name=\"author\" content=\"webmaster\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"webmaster\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"1 minute\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\\\/\\\/www.wikitechy.com\\\/interview-questions\\\/php\\\/what-is-null-in-php\\\/#article\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/www.wikitechy.com\\\/interview-questions\\\/php\\\/what-is-null-in-php\\\/\"},\"author\":{\"name\":\"webmaster\",\"@id\":\"https:\\\/\\\/www.wikitechy.com\\\/interview-questions\\\/#\\\/schema\\\/person\\\/f785ba3ecc599133e65ab6138042a3e4\"},\"headline\":\"What is NULL in PHP ?\",\"datePublished\":\"2022-08-02T12:16:39+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\\\/\\\/www.wikitechy.com\\\/interview-questions\\\/php\\\/what-is-null-in-php\\\/\"},\"wordCount\":199,\"commentCount\":0,\"image\":{\"@id\":\"https:\\\/\\\/www.wikitechy.com\\\/interview-questions\\\/php\\\/what-is-null-in-php\\\/#primaryimage\"},\"thumbnailUrl\":\"https:\\\/\\\/www.wikitechy.com\\\/interview-questions\\\/wp-content\\\/uploads\\\/2022\\\/08\\\/null-value-in-php.png\",\"keywords\":[\"check object is null in php\",\"how to assign null value in php\",\"how to use is null in mysql\",\"is not null in php\",\"is null function in mysql\",\"is null function in php\",\"is null in php mysql\",\"null in php\",\"what is null byte in php\",\"what is null coalescing in php\",\"what is null in php\",\"what is null in text\",\"what is null value in php\",\"what is the difference between null and empty in php\"],\"articleSection\":[\"PHP\"],\"inLanguage\":\"en-US\",\"potentialAction\":[{\"@type\":\"CommentAction\",\"name\":\"Comment\",\"target\":[\"https:\\\/\\\/www.wikitechy.com\\\/interview-questions\\\/php\\\/what-is-null-in-php\\\/#respond\"]}]},{\"@type\":\"WebPage\",\"@id\":\"https:\\\/\\\/www.wikitechy.com\\\/interview-questions\\\/php\\\/what-is-null-in-php\\\/\",\"url\":\"https:\\\/\\\/www.wikitechy.com\\\/interview-questions\\\/php\\\/what-is-null-in-php\\\/\",\"name\":\"What is NULL in PHP ? - PHP Null Function - Null in PHP - Wikitechy\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/www.wikitechy.com\\\/interview-questions\\\/#website\"},\"primaryImageOfPage\":{\"@id\":\"https:\\\/\\\/www.wikitechy.com\\\/interview-questions\\\/php\\\/what-is-null-in-php\\\/#primaryimage\"},\"image\":{\"@id\":\"https:\\\/\\\/www.wikitechy.com\\\/interview-questions\\\/php\\\/what-is-null-in-php\\\/#primaryimage\"},\"thumbnailUrl\":\"https:\\\/\\\/www.wikitechy.com\\\/interview-questions\\\/wp-content\\\/uploads\\\/2022\\\/08\\\/null-value-in-php.png\",\"datePublished\":\"2022-08-02T12:16:39+00:00\",\"author\":{\"@id\":\"https:\\\/\\\/www.wikitechy.com\\\/interview-questions\\\/#\\\/schema\\\/person\\\/f785ba3ecc599133e65ab6138042a3e4\"},\"description\":\"What is NULL in PHP ? - In PHP null () function is an inbuilt function which is used to find whether a variable is NULL or not.\",\"inLanguage\":\"en-US\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\\\/\\\/www.wikitechy.com\\\/interview-questions\\\/php\\\/what-is-null-in-php\\\/\"]}]},{\"@type\":\"ImageObject\",\"inLanguage\":\"en-US\",\"@id\":\"https:\\\/\\\/www.wikitechy.com\\\/interview-questions\\\/php\\\/what-is-null-in-php\\\/#primaryimage\",\"url\":\"https:\\\/\\\/www.wikitechy.com\\\/interview-questions\\\/wp-content\\\/uploads\\\/2022\\\/08\\\/null-value-in-php.png\",\"contentUrl\":\"https:\\\/\\\/www.wikitechy.com\\\/interview-questions\\\/wp-content\\\/uploads\\\/2022\\\/08\\\/null-value-in-php.png\",\"width\":1291,\"height\":519},{\"@type\":\"WebSite\",\"@id\":\"https:\\\/\\\/www.wikitechy.com\\\/interview-questions\\\/#website\",\"url\":\"https:\\\/\\\/www.wikitechy.com\\\/interview-questions\\\/\",\"name\":\"Wikitechy\",\"description\":\"Interview Questions\",\"potentialAction\":[{\"@type\":\"SearchAction\",\"target\":{\"@type\":\"EntryPoint\",\"urlTemplate\":\"https:\\\/\\\/www.wikitechy.com\\\/interview-questions\\\/?s={search_term_string}\"},\"query-input\":{\"@type\":\"PropertyValueSpecification\",\"valueRequired\":true,\"valueName\":\"search_term_string\"}}],\"inLanguage\":\"en-US\"},{\"@type\":\"Person\",\"@id\":\"https:\\\/\\\/www.wikitechy.com\\\/interview-questions\\\/#\\\/schema\\\/person\\\/f785ba3ecc599133e65ab6138042a3e4\",\"name\":\"webmaster\",\"image\":{\"@type\":\"ImageObject\",\"inLanguage\":\"en-US\",\"@id\":\"https:\\\/\\\/secure.gravatar.com\\\/avatar\\\/155b77fd8cdda3d0913fcb7e7ee63543b0c345d2d8f6dcebda5b0583ab61f967?s=96&d=mm&r=g\",\"url\":\"https:\\\/\\\/secure.gravatar.com\\\/avatar\\\/155b77fd8cdda3d0913fcb7e7ee63543b0c345d2d8f6dcebda5b0583ab61f967?s=96&d=mm&r=g\",\"contentUrl\":\"https:\\\/\\\/secure.gravatar.com\\\/avatar\\\/155b77fd8cdda3d0913fcb7e7ee63543b0c345d2d8f6dcebda5b0583ab61f967?s=96&d=mm&r=g\",\"caption\":\"webmaster\"},\"sameAs\":[\"https:\\\/\\\/www.wikitechy.com\\\/interview-questions\"],\"url\":\"https:\\\/\\\/www.wikitechy.com\\\/interview-questions\\\/author\\\/webmaster\\\/\"}]}<\/script>\n","yoast_head_json":{"title":"What is NULL in PHP ? - PHP Null Function - Null in PHP - Wikitechy","description":"What is NULL in PHP ? - In PHP null () function is an inbuilt function which is used to find whether a variable is NULL or not.","robots":{"index":"index","follow":"follow","max-snippet":"max-snippet:-1","max-image-preview":"max-image-preview:large","max-video-preview":"max-video-preview:-1"},"canonical":"https:\/\/www.wikitechy.com\/interview-questions\/php\/what-is-null-in-php\/","og_locale":"en_US","og_type":"article","og_title":"What is NULL in PHP ? - PHP Null Function - Null in PHP - Wikitechy","og_description":"What is NULL in PHP ? - In PHP null () function is an inbuilt function which is used to find whether a variable is NULL or not.","og_url":"https:\/\/www.wikitechy.com\/interview-questions\/php\/what-is-null-in-php\/","og_site_name":"Wikitechy","article_published_time":"2022-08-02T12:16:39+00:00","og_image":[{"url":"https:\/\/www.wikitechy.com\/interview-questions\/wp-content\/uploads\/2022\/08\/null-value-in-php.png","type":"","width":"","height":""}],"author":"webmaster","twitter_card":"summary_large_image","twitter_misc":{"Written by":"webmaster","Est. reading time":"1 minute"},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"Article","@id":"https:\/\/www.wikitechy.com\/interview-questions\/php\/what-is-null-in-php\/#article","isPartOf":{"@id":"https:\/\/www.wikitechy.com\/interview-questions\/php\/what-is-null-in-php\/"},"author":{"name":"webmaster","@id":"https:\/\/www.wikitechy.com\/interview-questions\/#\/schema\/person\/f785ba3ecc599133e65ab6138042a3e4"},"headline":"What is NULL in PHP ?","datePublished":"2022-08-02T12:16:39+00:00","mainEntityOfPage":{"@id":"https:\/\/www.wikitechy.com\/interview-questions\/php\/what-is-null-in-php\/"},"wordCount":199,"commentCount":0,"image":{"@id":"https:\/\/www.wikitechy.com\/interview-questions\/php\/what-is-null-in-php\/#primaryimage"},"thumbnailUrl":"https:\/\/www.wikitechy.com\/interview-questions\/wp-content\/uploads\/2022\/08\/null-value-in-php.png","keywords":["check object is null in php","how to assign null value in php","how to use is null in mysql","is not null in php","is null function in mysql","is null function in php","is null in php mysql","null in php","what is null byte in php","what is null coalescing in php","what is null in php","what is null in text","what is null value in php","what is the difference between null and empty in php"],"articleSection":["PHP"],"inLanguage":"en-US","potentialAction":[{"@type":"CommentAction","name":"Comment","target":["https:\/\/www.wikitechy.com\/interview-questions\/php\/what-is-null-in-php\/#respond"]}]},{"@type":"WebPage","@id":"https:\/\/www.wikitechy.com\/interview-questions\/php\/what-is-null-in-php\/","url":"https:\/\/www.wikitechy.com\/interview-questions\/php\/what-is-null-in-php\/","name":"What is NULL in PHP ? - PHP Null Function - Null in PHP - Wikitechy","isPartOf":{"@id":"https:\/\/www.wikitechy.com\/interview-questions\/#website"},"primaryImageOfPage":{"@id":"https:\/\/www.wikitechy.com\/interview-questions\/php\/what-is-null-in-php\/#primaryimage"},"image":{"@id":"https:\/\/www.wikitechy.com\/interview-questions\/php\/what-is-null-in-php\/#primaryimage"},"thumbnailUrl":"https:\/\/www.wikitechy.com\/interview-questions\/wp-content\/uploads\/2022\/08\/null-value-in-php.png","datePublished":"2022-08-02T12:16:39+00:00","author":{"@id":"https:\/\/www.wikitechy.com\/interview-questions\/#\/schema\/person\/f785ba3ecc599133e65ab6138042a3e4"},"description":"What is NULL in PHP ? - In PHP null () function is an inbuilt function which is used to find whether a variable is NULL or not.","inLanguage":"en-US","potentialAction":[{"@type":"ReadAction","target":["https:\/\/www.wikitechy.com\/interview-questions\/php\/what-is-null-in-php\/"]}]},{"@type":"ImageObject","inLanguage":"en-US","@id":"https:\/\/www.wikitechy.com\/interview-questions\/php\/what-is-null-in-php\/#primaryimage","url":"https:\/\/www.wikitechy.com\/interview-questions\/wp-content\/uploads\/2022\/08\/null-value-in-php.png","contentUrl":"https:\/\/www.wikitechy.com\/interview-questions\/wp-content\/uploads\/2022\/08\/null-value-in-php.png","width":1291,"height":519},{"@type":"WebSite","@id":"https:\/\/www.wikitechy.com\/interview-questions\/#website","url":"https:\/\/www.wikitechy.com\/interview-questions\/","name":"Wikitechy","description":"Interview Questions","potentialAction":[{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https:\/\/www.wikitechy.com\/interview-questions\/?s={search_term_string}"},"query-input":{"@type":"PropertyValueSpecification","valueRequired":true,"valueName":"search_term_string"}}],"inLanguage":"en-US"},{"@type":"Person","@id":"https:\/\/www.wikitechy.com\/interview-questions\/#\/schema\/person\/f785ba3ecc599133e65ab6138042a3e4","name":"webmaster","image":{"@type":"ImageObject","inLanguage":"en-US","@id":"https:\/\/secure.gravatar.com\/avatar\/155b77fd8cdda3d0913fcb7e7ee63543b0c345d2d8f6dcebda5b0583ab61f967?s=96&d=mm&r=g","url":"https:\/\/secure.gravatar.com\/avatar\/155b77fd8cdda3d0913fcb7e7ee63543b0c345d2d8f6dcebda5b0583ab61f967?s=96&d=mm&r=g","contentUrl":"https:\/\/secure.gravatar.com\/avatar\/155b77fd8cdda3d0913fcb7e7ee63543b0c345d2d8f6dcebda5b0583ab61f967?s=96&d=mm&r=g","caption":"webmaster"},"sameAs":["https:\/\/www.wikitechy.com\/interview-questions"],"url":"https:\/\/www.wikitechy.com\/interview-questions\/author\/webmaster\/"}]}},"_links":{"self":[{"href":"https:\/\/www.wikitechy.com\/interview-questions\/wp-json\/wp\/v2\/posts\/4557","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.wikitechy.com\/interview-questions\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.wikitechy.com\/interview-questions\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.wikitechy.com\/interview-questions\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.wikitechy.com\/interview-questions\/wp-json\/wp\/v2\/comments?post=4557"}],"version-history":[{"count":1,"href":"https:\/\/www.wikitechy.com\/interview-questions\/wp-json\/wp\/v2\/posts\/4557\/revisions"}],"predecessor-version":[{"id":4559,"href":"https:\/\/www.wikitechy.com\/interview-questions\/wp-json\/wp\/v2\/posts\/4557\/revisions\/4559"}],"wp:attachment":[{"href":"https:\/\/www.wikitechy.com\/interview-questions\/wp-json\/wp\/v2\/media?parent=4557"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.wikitechy.com\/interview-questions\/wp-json\/wp\/v2\/categories?post=4557"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.wikitechy.com\/interview-questions\/wp-json\/wp\/v2\/tags?post=4557"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}

<\/div>

$apple = 0;echo "apple is " . is_null($a) . "
";$orange = null;echo "orange is " . is_null($b) . "
";$grape = "null";echo "grape is " . is_null($c) . "
";$watermelon = NULL;echo "watermelon is " . is_null($d) . "
";?><\/body><\/html><\/code><\/pre> <\/div>\nOutput<\/h2>\n<\/p>\n","protected":false},"excerpt":{"rendered":"
In PHP null () function is an inbuilt function which is used to find whether a variable is NULL or not. If it returns True the given variable is null, otherwise it returns False. If the value of $x is equal to NULL it returns true and it is an identical comparison operator. In PHP […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[8182],"tags":[17710,17712,17719,17711,17722,17718,17721,17709,17716,17717,17713,17720,17714,17715],"class_list":["post-4557","post","type-post","status-publish","format-standard","hentry","category-php","tag-check-object-is-null-in-php","tag-how-to-assign-null-value-in-php","tag-how-to-use-is-null-in-mysql","tag-is-not-null-in-php","tag-is-null-function-in-mysql","tag-is-null-function-in-php","tag-is-null-in-php-mysql","tag-null-in-php","tag-what-is-null-byte-in-php","tag-what-is-null-coalescing-in-php","tag-what-is-null-in-php","tag-what-is-null-in-text","tag-what-is-null-value-in-php","tag-what-is-the-difference-between-null-and-empty-in-php"],"yoast_head":"\nWhat is NULL in PHP ? - PHP Null Function - Null in PHP - Wikitechy<\/title>\n<meta name=\"description\" content=\"What is NULL in PHP ? - In PHP null () function is an inbuilt function which is used to find whether a variable is NULL or not.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.wikitechy.com\/interview-questions\/php\/what-is-null-in-php\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"What is NULL in PHP ? - PHP Null Function - Null in PHP - Wikitechy\" \/>\n<meta property=\"og:description\" content=\"What is NULL in PHP ? - In PHP null () function is an inbuilt function which is used to find whether a variable is NULL or not.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.wikitechy.com\/interview-questions\/php\/what-is-null-in-php\/\" \/>\n<meta property=\"og:site_name\" content=\"Wikitechy\" \/>\n<meta property=\"article:published_time\" content=\"2022-08-02T12:16:39+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/www.wikitechy.com\/interview-questions\/wp-content\/uploads\/2022\/08\/null-value-in-php.png\" \/>\n<meta name=\"author\" content=\"webmaster\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"webmaster\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"1 minute\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\\\/\\\/www.wikitechy.com\\\/interview-questions\\\/php\\\/what-is-null-in-php\\\/#article\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/www.wikitechy.com\\\/interview-questions\\\/php\\\/what-is-null-in-php\\\/\"},\"author\":{\"name\":\"webmaster\",\"@id\":\"https:\\\/\\\/www.wikitechy.com\\\/interview-questions\\\/#\\\/schema\\\/person\\\/f785ba3ecc599133e65ab6138042a3e4\"},\"headline\":\"What is NULL in PHP ?\",\"datePublished\":\"2022-08-02T12:16:39+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\\\/\\\/www.wikitechy.com\\\/interview-questions\\\/php\\\/what-is-null-in-php\\\/\"},\"wordCount\":199,\"commentCount\":0,\"image\":{\"@id\":\"https:\\\/\\\/www.wikitechy.com\\\/interview-questions\\\/php\\\/what-is-null-in-php\\\/#primaryimage\"},\"thumbnailUrl\":\"https:\\\/\\\/www.wikitechy.com\\\/interview-questions\\\/wp-content\\\/uploads\\\/2022\\\/08\\\/null-value-in-php.png\",\"keywords\":[\"check object is null in php\",\"how to assign null value in php\",\"how to use is null in mysql\",\"is not null in php\",\"is null function in mysql\",\"is null function in php\",\"is null in php mysql\",\"null in php\",\"what is null byte in php\",\"what is null coalescing in php\",\"what is null in php\",\"what is null in text\",\"what is null value in php\",\"what is the difference between null and empty in php\"],\"articleSection\":[\"PHP\"],\"inLanguage\":\"en-US\",\"potentialAction\":[{\"@type\":\"CommentAction\",\"name\":\"Comment\",\"target\":[\"https:\\\/\\\/www.wikitechy.com\\\/interview-questions\\\/php\\\/what-is-null-in-php\\\/#respond\"]}]},{\"@type\":\"WebPage\",\"@id\":\"https:\\\/\\\/www.wikitechy.com\\\/interview-questions\\\/php\\\/what-is-null-in-php\\\/\",\"url\":\"https:\\\/\\\/www.wikitechy.com\\\/interview-questions\\\/php\\\/what-is-null-in-php\\\/\",\"name\":\"What is NULL in PHP ? - PHP Null Function - Null in PHP - Wikitechy\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/www.wikitechy.com\\\/interview-questions\\\/#website\"},\"primaryImageOfPage\":{\"@id\":\"https:\\\/\\\/www.wikitechy.com\\\/interview-questions\\\/php\\\/what-is-null-in-php\\\/#primaryimage\"},\"image\":{\"@id\":\"https:\\\/\\\/www.wikitechy.com\\\/interview-questions\\\/php\\\/what-is-null-in-php\\\/#primaryimage\"},\"thumbnailUrl\":\"https:\\\/\\\/www.wikitechy.com\\\/interview-questions\\\/wp-content\\\/uploads\\\/2022\\\/08\\\/null-value-in-php.png\",\"datePublished\":\"2022-08-02T12:16:39+00:00\",\"author\":{\"@id\":\"https:\\\/\\\/www.wikitechy.com\\\/interview-questions\\\/#\\\/schema\\\/person\\\/f785ba3ecc599133e65ab6138042a3e4\"},\"description\":\"What is NULL in PHP ? - In PHP null () function is an inbuilt function which is used to find whether a variable is NULL or not.\",\"inLanguage\":\"en-US\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\\\/\\\/www.wikitechy.com\\\/interview-questions\\\/php\\\/what-is-null-in-php\\\/\"]}]},{\"@type\":\"ImageObject\",\"inLanguage\":\"en-US\",\"@id\":\"https:\\\/\\\/www.wikitechy.com\\\/interview-questions\\\/php\\\/what-is-null-in-php\\\/#primaryimage\",\"url\":\"https:\\\/\\\/www.wikitechy.com\\\/interview-questions\\\/wp-content\\\/uploads\\\/2022\\\/08\\\/null-value-in-php.png\",\"contentUrl\":\"https:\\\/\\\/www.wikitechy.com\\\/interview-questions\\\/wp-content\\\/uploads\\\/2022\\\/08\\\/null-value-in-php.png\",\"width\":1291,\"height\":519},{\"@type\":\"WebSite\",\"@id\":\"https:\\\/\\\/www.wikitechy.com\\\/interview-questions\\\/#website\",\"url\":\"https:\\\/\\\/www.wikitechy.com\\\/interview-questions\\\/\",\"name\":\"Wikitechy\",\"description\":\"Interview Questions\",\"potentialAction\":[{\"@type\":\"SearchAction\",\"target\":{\"@type\":\"EntryPoint\",\"urlTemplate\":\"https:\\\/\\\/www.wikitechy.com\\\/interview-questions\\\/?s={search_term_string}\"},\"query-input\":{\"@type\":\"PropertyValueSpecification\",\"valueRequired\":true,\"valueName\":\"search_term_string\"}}],\"inLanguage\":\"en-US\"},{\"@type\":\"Person\",\"@id\":\"https:\\\/\\\/www.wikitechy.com\\\/interview-questions\\\/#\\\/schema\\\/person\\\/f785ba3ecc599133e65ab6138042a3e4\",\"name\":\"webmaster\",\"image\":{\"@type\":\"ImageObject\",\"inLanguage\":\"en-US\",\"@id\":\"https:\\\/\\\/secure.gravatar.com\\\/avatar\\\/155b77fd8cdda3d0913fcb7e7ee63543b0c345d2d8f6dcebda5b0583ab61f967?s=96&d=mm&r=g\",\"url\":\"https:\\\/\\\/secure.gravatar.com\\\/avatar\\\/155b77fd8cdda3d0913fcb7e7ee63543b0c345d2d8f6dcebda5b0583ab61f967?s=96&d=mm&r=g\",\"contentUrl\":\"https:\\\/\\\/secure.gravatar.com\\\/avatar\\\/155b77fd8cdda3d0913fcb7e7ee63543b0c345d2d8f6dcebda5b0583ab61f967?s=96&d=mm&r=g\",\"caption\":\"webmaster\"},\"sameAs\":[\"https:\\\/\\\/www.wikitechy.com\\\/interview-questions\"],\"url\":\"https:\\\/\\\/www.wikitechy.com\\\/interview-questions\\\/author\\\/webmaster\\\/\"}]}<\/script>\n<!-- \/ Yoast SEO plugin. -->","yoast_head_json":{"title":"What is NULL in PHP ? - PHP Null Function - Null in PHP - Wikitechy","description":"What is NULL in PHP ? - In PHP null () function is an inbuilt function which is used to find whether a variable is NULL or not.","robots":{"index":"index","follow":"follow","max-snippet":"max-snippet:-1","max-image-preview":"max-image-preview:large","max-video-preview":"max-video-preview:-1"},"canonical":"https:\/\/www.wikitechy.com\/interview-questions\/php\/what-is-null-in-php\/","og_locale":"en_US","og_type":"article","og_title":"What is NULL in PHP ? - PHP Null Function - Null in PHP - Wikitechy","og_description":"What is NULL in PHP ? - In PHP null () function is an inbuilt function which is used to find whether a variable is NULL or not.","og_url":"https:\/\/www.wikitechy.com\/interview-questions\/php\/what-is-null-in-php\/","og_site_name":"Wikitechy","article_published_time":"2022-08-02T12:16:39+00:00","og_image":[{"url":"https:\/\/www.wikitechy.com\/interview-questions\/wp-content\/uploads\/2022\/08\/null-value-in-php.png","type":"","width":"","height":""}],"author":"webmaster","twitter_card":"summary_large_image","twitter_misc":{"Written by":"webmaster","Est. reading time":"1 minute"},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"Article","@id":"https:\/\/www.wikitechy.com\/interview-questions\/php\/what-is-null-in-php\/#article","isPartOf":{"@id":"https:\/\/www.wikitechy.com\/interview-questions\/php\/what-is-null-in-php\/"},"author":{"name":"webmaster","@id":"https:\/\/www.wikitechy.com\/interview-questions\/#\/schema\/person\/f785ba3ecc599133e65ab6138042a3e4"},"headline":"What is NULL in PHP ?","datePublished":"2022-08-02T12:16:39+00:00","mainEntityOfPage":{"@id":"https:\/\/www.wikitechy.com\/interview-questions\/php\/what-is-null-in-php\/"},"wordCount":199,"commentCount":0,"image":{"@id":"https:\/\/www.wikitechy.com\/interview-questions\/php\/what-is-null-in-php\/#primaryimage"},"thumbnailUrl":"https:\/\/www.wikitechy.com\/interview-questions\/wp-content\/uploads\/2022\/08\/null-value-in-php.png","keywords":["check object is null in php","how to assign null value in php","how to use is null in mysql","is not null in php","is null function in mysql","is null function in php","is null in php mysql","null in php","what is null byte in php","what is null coalescing in php","what is null in php","what is null in text","what is null value in php","what is the difference between null and empty in php"],"articleSection":["PHP"],"inLanguage":"en-US","potentialAction":[{"@type":"CommentAction","name":"Comment","target":["https:\/\/www.wikitechy.com\/interview-questions\/php\/what-is-null-in-php\/#respond"]}]},{"@type":"WebPage","@id":"https:\/\/www.wikitechy.com\/interview-questions\/php\/what-is-null-in-php\/","url":"https:\/\/www.wikitechy.com\/interview-questions\/php\/what-is-null-in-php\/","name":"What is NULL in PHP ? - PHP Null Function - Null in PHP - Wikitechy","isPartOf":{"@id":"https:\/\/www.wikitechy.com\/interview-questions\/#website"},"primaryImageOfPage":{"@id":"https:\/\/www.wikitechy.com\/interview-questions\/php\/what-is-null-in-php\/#primaryimage"},"image":{"@id":"https:\/\/www.wikitechy.com\/interview-questions\/php\/what-is-null-in-php\/#primaryimage"},"thumbnailUrl":"https:\/\/www.wikitechy.com\/interview-questions\/wp-content\/uploads\/2022\/08\/null-value-in-php.png","datePublished":"2022-08-02T12:16:39+00:00","author":{"@id":"https:\/\/www.wikitechy.com\/interview-questions\/#\/schema\/person\/f785ba3ecc599133e65ab6138042a3e4"},"description":"What is NULL in PHP ? - In PHP null () function is an inbuilt function which is used to find whether a variable is NULL or not.","inLanguage":"en-US","potentialAction":[{"@type":"ReadAction","target":["https:\/\/www.wikitechy.com\/interview-questions\/php\/what-is-null-in-php\/"]}]},{"@type":"ImageObject","inLanguage":"en-US","@id":"https:\/\/www.wikitechy.com\/interview-questions\/php\/what-is-null-in-php\/#primaryimage","url":"https:\/\/www.wikitechy.com\/interview-questions\/wp-content\/uploads\/2022\/08\/null-value-in-php.png","contentUrl":"https:\/\/www.wikitechy.com\/interview-questions\/wp-content\/uploads\/2022\/08\/null-value-in-php.png","width":1291,"height":519},{"@type":"WebSite","@id":"https:\/\/www.wikitechy.com\/interview-questions\/#website","url":"https:\/\/www.wikitechy.com\/interview-questions\/","name":"Wikitechy","description":"Interview Questions","potentialAction":[{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https:\/\/www.wikitechy.com\/interview-questions\/?s={search_term_string}"},"query-input":{"@type":"PropertyValueSpecification","valueRequired":true,"valueName":"search_term_string"}}],"inLanguage":"en-US"},{"@type":"Person","@id":"https:\/\/www.wikitechy.com\/interview-questions\/#\/schema\/person\/f785ba3ecc599133e65ab6138042a3e4","name":"webmaster","image":{"@type":"ImageObject","inLanguage":"en-US","@id":"https:\/\/secure.gravatar.com\/avatar\/155b77fd8cdda3d0913fcb7e7ee63543b0c345d2d8f6dcebda5b0583ab61f967?s=96&d=mm&r=g","url":"https:\/\/secure.gravatar.com\/avatar\/155b77fd8cdda3d0913fcb7e7ee63543b0c345d2d8f6dcebda5b0583ab61f967?s=96&d=mm&r=g","contentUrl":"https:\/\/secure.gravatar.com\/avatar\/155b77fd8cdda3d0913fcb7e7ee63543b0c345d2d8f6dcebda5b0583ab61f967?s=96&d=mm&r=g","caption":"webmaster"},"sameAs":["https:\/\/www.wikitechy.com\/interview-questions"],"url":"https:\/\/www.wikitechy.com\/interview-questions\/author\/webmaster\/"}]}},"_links":{"self":[{"href":"https:\/\/www.wikitechy.com\/interview-questions\/wp-json\/wp\/v2\/posts\/4557","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.wikitechy.com\/interview-questions\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.wikitechy.com\/interview-questions\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.wikitechy.com\/interview-questions\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.wikitechy.com\/interview-questions\/wp-json\/wp\/v2\/comments?post=4557"}],"version-history":[{"count":1,"href":"https:\/\/www.wikitechy.com\/interview-questions\/wp-json\/wp\/v2\/posts\/4557\/revisions"}],"predecessor-version":[{"id":4559,"href":"https:\/\/www.wikitechy.com\/interview-questions\/wp-json\/wp\/v2\/posts\/4557\/revisions\/4559"}],"wp:attachment":[{"href":"https:\/\/www.wikitechy.com\/interview-questions\/wp-json\/wp\/v2\/media?parent=4557"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.wikitechy.com\/interview-questions\/wp-json\/wp\/v2\/categories?post=4557"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.wikitechy.com\/interview-questions\/wp-json\/wp\/v2\/tags?post=4557"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}