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  • Conditional statements are used in order to perform the different actions based on the different conditions.
  • Very frequently when are you are writing the code, you need to perform different actions for different conditions.
  • In PHP, we have to follow four conditional statements:
    • if statement
    • if...else statement
    • if...elseif....else statement
    • switch statement
  • if statement - use this statement to execute some code only if a specified condition is true
  • if...else statement - use this statement to execute some code if a condition is true and another code if the condition is false
  • if...elseif....else statement - use this statement to select one of several blocks of code to be executed
  • switch statement - use this statement to select one of many blocks of code to be executed

if Statement :

  • if expression is evaluated to a Boolean value.
  • If the expression evaluates to be TRUE, PHP will execute its statement.
 If Statement

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php language Syntax :

if (condition) 
{
   condition statement is true;
}
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if...else Statement :

  • The ifelse expression executes some code if a condition is true, if condition is false PHP will execute the else statement.
 If Else Statement

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php language Syntax :

if (condition) 
{
    condition statement is true;
} 
else 
{
    condition statement is false;
}
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if...elseif....else Statement :

  • The if....elseif...else statement executes different codes for more than two conditions.
 If Elseif Statement

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php language Syntax :

if (condition) 
{
    condition statement is true;
} 
elseif (condition) 
{
    condition statement is true;
} 
else 
{
    condition statement is false;
}
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switch Statement :

  • The switch statement is used to perform different actions based on the different conditions.
  • The switch statement is used to select one of many blocks .
 Switch Statement

Learn PHP - PHP tutorial - Switch Statement - PHP examples - PHP programs

php language Syntax :

switch (n) {
    case label1:
        code to be executed if n=label1;
        break;
    case label2:
        code to be executed if n=label2;
        break;
    case label3:
        code to be executed if n=label3;
        break;
    ...
    default:
        code to be executed if n is different from all labels;
}
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