Scalar data types<\/strong><\/h2>\n

\n
• Scalar data types hold only single value and it consists of four data types, they are boolean, integer, float and string.<\/li>\n<\/ul>\n

  Boolean<\/strong><\/h3>\n

  \n
  • Booleans are the simplest data type works like switch and holds only two values TRUE (1) or FALSE (0).<\/li>\n
  • It is often used with conditional statements were if the condition is correct, it returns TRUE otherwise FALSE.<\/li>\n<\/ul>\n

    Sample Code<\/strong><\/p>\n

    <\/div>

    <?php       if (TRUE)          echo "This condition is TRUE.";      if (FALSE)          echo "This condition is FALSE.";  ?>  <\/code><\/pre> <\/div>\n
    Output<\/strong><\/p>\n
    <\/p>\n
    Integer<\/h3>\n
    \n
    Integer means numeric data, it can be\u00a0either positive or negative sign.<\/li>\n
    It holds only whole numbers, like numbers without decimal points or fractional parts.<\/li>\n<\/ul>\n
    Sample Code<\/strong><\/p>\n
     
     <\/div> 
    <?php       $dec1 = 34;      $oct1 = 0243;      $hexa1 = 0x45;      echo "Decimal number: " .$dec1. "<\/br>";      echo "Octal number: " .$oct1. "<\/br>";      echo "HexaDecimal number: " .$hexa1. "<\/br>";  ?>  <\/code><\/pre> <\/div>\n
    Output<\/strong><\/p>\n
    <\/p>\n
    Float<\/h3>\n
    \n
    A floating-point number is a number with a decimal point and unlike integer, it can hold numbers with a fractional or decimal point, including a negative or positive sign.<\/li>\n<\/ul>\n
    Sample Code<\/strong><\/p>\n
     
     <\/div> 
    <?php       $n1 = 19.34;      $n2 = 54.472;      $sum = $n1 + $n2;      echo "Addition of floating numbers: " .$sum;  ?>  <\/code><\/pre> <\/div>\n
    Output<\/strong><\/p>\n
    <\/p>\n
    String<\/h3>\n
    \n
    String is a non-numeric data type which holds letters or any alphabets, numbers, and even special characters.<\/li>\n
    Its value must be enclosed either within single quotes\u00a0<\/strong>or in\u00a0double quotes<\/strong> and both are treated differently.<\/li>\n<\/ul>\n
    Sample\u00a0 Code<\/strong><\/p>\n
     
     <\/div> 
    <?php       $company = "Wikitechy";      \/\/both single and double quote statements will treat different      echo "Welcome to $company";      echo "<\/br>";      echo "Welcome to $company';  ?>  <\/code><\/pre> <\/div>\n
    Output<\/strong><\/p>\n
    <\/p>\n
    Compound data type<\/strong><\/h2>\n
    \n
    Compound data type can hold multiple and it consists of two data types, they are array and object.<\/li>\n<\/ul>\n
    Array<\/strong><\/h3>\n
    \n
    In single variable an array canstore multiple values of same data type.<\/li>\n<\/ul>\n
    Sample Code<\/strong><\/p>\n
     
     <\/div> 
    <?php\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0$bikes\u00a0=\u00a0array\u00a0("Royal\u00a0Enfield",\u00a0"Yamaha",\u00a0"KTM");\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0var_dump($bikes);\u00a0\u00a0\u00a0\/\/the\u00a0var_dump()\u00a0function\u00a0returns\u00a0the\u00a0datatype\u00a0and\u00a0values\u00a0\u00a0\u00a0 \u00a0echo\u00a0"<\/br>";\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0echo\u00a0"Array\u00a0Element1:\u00a0$bikes[0]\u00a0<\/br>";\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0echo\u00a0"Array\u00a0Element2:\u00a0$bikes[1]\u00a0<\/br>";\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0echo\u00a0"Array\u00a0Element3:\u00a0$bikes[2]\u00a0<\/br>";\u00a0\u00a0?>\u00a0\u00a0<\/code><\/pre> <\/div>\n
    Output<\/strong><\/p>\n
    <\/p>\n
    Object<\/strong><\/h3>\n
    \n
    Objects are the instances of user-defined classes that can store both functions and values.<\/li>\n
    It must be explicitly declared.<\/li>\n<\/ul>\n
    Sample Code<\/strong><\/p>\n
     
     <\/div> 
    <?php        class bike {            function model() {                 $model_name = "Jawa";                 echo "Bike Model: " .$model_name;               }       }       $obj = new bike();       $obj -> model();  ?>  <\/code><\/pre> <\/div>\n
    Output<\/strong><\/p>\n
    <\/p>\n
    Special Data Type<\/h2>\n
    \n
    Special data types consist of two types, they are Null and resource data type.<\/li>\n<\/ul>\n
    Null<\/h3>\n
    \n
    Null is a special data type that has only one value is NULL and there is a convention of writing it in capital letters as it is case sensitive.<\/li>\n
    In special data type NULL defined a variable with no value.<\/li>\n<\/ul>\n
    Sample Code<\/strong><\/p>\n
     
     <\/div> 
    <?php        $nl = NULL;      echo $nl;   \/\/it will not give any output      ?>  <\/code><\/pre> <\/div>\n
    Output<\/strong><\/p>\n
    <\/p>\n
    Resource:<\/h3>\n
    \n
    In PHP resources are not the exact data type and basically these are used to references to external PHP resources or store some small function calls.<\/li>\n<\/ul>\n
    \n","protected":false},"excerpt":{"rendered":"
    PHP data types are used to hold different types of values or data. There are eight primitive data types which are further categorized into three types, they are: Scalar types Compound types Special types Scalar data types Scalar data types hold only single value and it consists of four data types, they are boolean, integer, […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"passster_activate_protection":false,"passster_protect_child_pages":"","passster_protection_type":"password","passster_password":"","passster_activate_overwrite_defaults":"","passster_headline":"","passster_instruction":"","passster_placeholder":"","passster_button":"","passster_id":"","passster_activate_misc_settings":"","passster_redirect_url":"","passster_hide":"no","passster_area_shortcode":"","gtb_hide_title":false,"gtb_wrap_title":false,"gtb_class_title":"","gtb_remove_headerfooter":false,"footnotes":""},"categories":[8182],"tags":[17597,17599,17596,17594,17601,17600,17598,17595],"class_list":["post-4506","post","type-post","status-publish","format-standard","hentry","category-php","tag-datatypes-in-php","tag-null-data-type-in-php","tag-php-5-data-types","tag-php-data-types","tag-php-variable-type-declaration","tag-special-data-types-in-php","tag-types-of-variables-in-php-with-example","tag-understanding-the-php-data-types"],"yoast_head":"\n