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05-04-2009, 04:50 PM
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PHP If...Else Statements
The if, elseif and else statements in PHP are used to perform different actions based on different conditions.
Conditional Statements Very often when you write code, you want to perform different actions for different decisions. You can use conditional statements in your code to do this.
If you want to execute some code if a condition is true and another code if a condition is false, use the if....else statement. Syntax if (condition) code to be executed if condition is true; else code to be executed if condition is false; Example The following example will output "Have a nice weekend!" if the current day is Friday, otherwise it will output "Have a nice day!": $d=date("D"); if ($d=="Fri") echo "Have a nice weekend!"; else echo "Have a nice day!"; ?> If more than one line should be executed if a condition is true/false, the lines should be enclosed within curly braces: $d=date("D"); if ($d=="Fri") { echo "Hello! "; echo "Have a nice weekend!"; echo "See you on Monday!"; } ?> The ElseIf Statement If you want to execute some code if one of several conditions are true use the elseif statement Syntax if (condition) code to be executed if condition is true; elseif (condition) code to be executed if condition is true; else code to be executed if condition is false; Example The following example will output "Have a nice weekend!" if the current day is Friday, and "Have a nice Sunday!" if the current day is Sunday. Otherwise it will output "Have a nice day!": $d=date("D"); if ($d=="Fri") echo "Have a nice weekend!"; elseif ($d=="Sun") echo "Have a nice Sunday!"; else echo "Have a nice day!"; ?> 
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