filter_var

Filters a variable with a specified filter (PHP 5 >= 5.2.0, PECL filter:0.11.0)
mixed filter_var ( mixed variable [, int filter [, mixed options]] )

Parameters

variable: Value to filter, arrays are filtered recursively.
filter: ID of a filter to use. Defaults to FILTER_SANITIZE_STRING.
options: Associative array of options or bitwise disjunction of flags. If filter accepts options, flags can be provided in "flags" field of array. For the "callback" filter, callback type should be passed.

Return Values

Returns the filtered data, or FALSE if the filter fails.

Examples

Example 678. A filter_var() example

<?php

var_dump(filter_var('bob@example.com', FILTER_VALIDATE_EMAIL));
var_dump(filter_var('example.com', FILTER_VALIDATE_URL, FILTER_FLAG_SCHEME_REQUIRED));
?>

The above example will output:

copy to clipboard

string(15) "bob@example.com"

bool(false)

See Also

filter_var_array()

filter_input()

filter_input_array()

information about the callback type

I managed to get this to work with PHP 5.1.6 on CentOS 5 with minor difficulty. 1) Download the PECL filter package 2) Extract the tarball 3) phpize the directory 4) ./configure 5) make 6) filter-0.11.0/logical_filters.c:25:31: error: ext/pcre/php_pcre.h: No such file or directory 7) find / -name php_pcre.h 8) Make sure php-devel is installed 9) Edit filter-0.11.0/logical_filters.c and replace "ext/pcre/php_pcre.h" with the absolute path of php_pcre.h 10) make 11) make install 12) add "extension=filter.so" to php.ini 13) Restart Apache

filter_var

Filters a variable with a specified filter (PHP 5 >= 5.2.0, PECL filter:0.11.0)
mixed filter_var ( mixed variable [, int filter [, mixed options]] )

Parameters

Return Values

Examples

Example 678. A filter_var() example

Code Examples / Notes » filter_var

Change Language

filter_var

Filters a variable with a specified filter (PHP 5 >= 5.2.0, PECL filter:0.11.0) mixed filter_var ( mixed variable [, int filter [, mixed options]] )

Parameters

Return Values

Examples

Example 678. A filter_var() example

Code Examples / Notes » filter_var

Change Language

Filters a variable with a specified filter (PHP 5 >= 5.2.0, PECL filter:0.11.0)
mixed filter_var ( mixed variable [, int filter [, mixed options]] )