PHP filter_var() Function
 Complete PHP Filter Reference
Definition and Usage
The filter_var() function filters a variable with the specified filter.
Returns the filtered data on success or FALSE on failure.
Syntax
|
filter_var(variable, filter, options)
|
| Parameter |
Description |
| variable |
Required. Specifies the variable to filter |
| filter |
Optional. Specifies the ID of the filter to use.
Default is FILTER_SANITIZE_STRING. Check the
Complete PHP Filter Reference for
possible filters A filter ID can be an ID name (like FILTER_VALIDATE_EMAIL)
or an ID number (like 274) |
| options |
Optional. Specifies an associative array of flags/options or
a single flag/option. Check each filter for possible options and flags |
Example
<?php
if(!filter_var("someone@example....com", FILTER_VALIDATE_EMAIL))
{
echo("E-mail is not valid");
}
else
{
echo("E-mail is valid");
}
?>
|
The output of the code should be:
Complete PHP Filter Reference
|
