Filter Var Function in PHP

The filter_var() function is used to filter a variable with a specified filter.

Syntax

filter_var(variable, filter, options)

Parameters

• variable − The name of variable.

• filter − The name of filter to get ID.

• options − Specifies options to use.

Return

The filter_var() function returns filtered data on success, or false on failure.

Example

 Live Demo

<?php
   $myEmail = "[email protected]";
   if (filter_var($myEmail, FILTER_VALIDATE_EMAIL {
      echo("$myEmail = valid email address");
   } else {
      echo("$myEmail = invalid email address");
   }
?>

Output

The following is the output.

[email protected] = valid email address