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PHP filter_var() Function
Definition and Usage
The filter_var() function filters the variable through the specified filter.
If successful, it returns filtered data; if failed, it returns false.
Syntaxvariablefilter_var( filterfilter_var( options)
| , | Description |
|---|---|
| variable | Required. Specify the variable to be filtered. |
| filter | Optional. Specify the ID of the filter to be used. |
| options | Specify an array containing flags/options. Check each filter's possible flags and options. |
Tips and Comments
Tip:SeeComplete PHP Filter Reference Manual，view the filters that can be used with this function.
Example
<?php
if(!filter_var("someone@example....com", FILTER_VALIDATE_EMAIL))
{
echo("E-mail is not valid");
}
else
{
echo("E-mail is valid");
}
?>
Output similar to:
E-mail is not valid
