PHP 手册
后退		前进

filter_var

(no version information, might be only in CVS)

filter_var -- Filters a variable with a specified filter

说明

mixed filter_var ( mixed variable [, int filter [, mixed options]] )

参数

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.

返回值

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

范例

例子 1. 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)); ?>
上例将输出：
string(15) "bob@example.com" bool(false)

参见

filter_var_array()

filter_input()

filter_input_array()

有关 callback 类型的信息

后退	起点	前进
filter_var_array	上一级	Firebird/InterBase Functions

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