(PHP 5 >= 5.2.0, PHP 7)
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filterThe ID of the filter to apply. The Types of filters manual page lists the available filters.
If omitted, FILTER_DEFAULT will be used, which is
equivalent to
FILTER_UNSAFE_RAW.
This will result in no filtering taking place by default.
options一锟斤拷选锟斤拷墓锟斤拷锟斤拷锟斤拷椋拷锟斤拷甙锟轿伙拷锟斤拷值谋锟绞撅拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷选锟筋，锟斤拷锟斤拷通锟斤拷锟斤拷锟斤拷锟� "flags" 位去锟结供锟斤拷些锟斤拷示锟斤拷 锟斤拷锟节回碉拷锟酵的癸拷锟斤拷锟斤拷锟斤拷应锟矫达拷锟斤拷 callable锟斤拷锟斤拷锟斤拷氐锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷一锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟剿碉拷值锟斤拷锟斤拷锟斤拷 锟斤拷锟斤拷一锟斤拷锟节癸拷锟斤拷/锟斤拷锟斤拷锟斤拷锟街碉拷锟�
<?php
// for filters that accept options, use this format
$options = array(
'options' => array(
'default' => 3, // value to return if the filter fails
// other options here
'min_range' => 0
),
'flags' => FILTER_FLAG_ALLOW_OCTAL,
);
$var = filter_var('0755', FILTER_VALIDATE_INT, $options);
// for filter that only accept flags, you can pass them directly
$var = filter_var('oops', FILTER_VALIDATE_BOOLEAN, FILTER_NULL_ON_FAILURE);
// for filter that only accept flags, you can also pass as an array
$var = filter_var('oops', FILTER_VALIDATE_BOOLEAN,
array('flags' => FILTER_NULL_ON_FAILURE));
// callback validate filter
function foo($value)
{
// Expected format: Surname, GivenNames
if (strpos($value, ", ") === false) return false;
list($surname, $givennames) = explode(", ", $value, 2);
$empty = (empty($surname) || empty($givennames));
$notstrings = (!is_string($surname) || !is_string($givennames));
if ($empty || $notstrings) {
return false;
} else {
return $value;
}
}
$var = filter_var('Doe, Jane Sue', FILTER_CALLBACK, array('options' => 'foo'));
?>
Returns the filtered data, or FALSE if the filter fails.
Example #1 一锟斤拷 filter_var() 锟斤拷锟斤拷锟斤拷
<?php
var_dump(filter_var('bob@example.com', FILTER_VALIDATE_EMAIL));
var_dump(filter_var('http://example.com', FILTER_VALIDATE_URL, FILTER_FLAG_PATH_REQUIRED));
?>
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string(15) "bob@example.com" bool(false)