(PHP 5 >= 5.3.0, PHP 7)
preg_filter — 执锟斤拷一锟斤拷锟斤拷锟斤拷锟斤拷式锟斤拷锟斤拷锟斤拷锟芥换
$pattern
, mixed $replacement
, mixed $subject
[, int $limit = -1
[, int &$count
]] ) : mixedpreg_filter()锟饺硷拷锟斤拷preg_replace() 锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷(锟斤拷锟杰撅拷锟斤拷转锟斤拷)锟斤拷目锟斤拷匹锟斤拷慕锟斤拷. 锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷母锟斤拷锟较革拷锟较拷锟斤拷亩锟� preg_replace()锟侥碉拷.
锟斤拷锟�subject锟斤拷一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
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时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斤拷锟斤拷锟斤拷锟�NULL锟斤拷
Example #1 锟饺斤拷preg_filter() 锟斤拷preg_replace()锟斤拷示锟斤拷
<?php
$subject = array('1', 'a', '2', 'b', '3', 'A', 'B', '4');
$pattern = array('/\d/', '/[a-z]/', '/[1a]/');
$replace = array('A:$0', 'B:$0', 'C:$0');
echo "preg_filter returns\n";
print_r(preg_filter($pattern, $replace, $subject));
echo "preg_replace returns\n";
print_r(preg_replace($pattern, $replace, $subject));
?>
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preg_filter returns
Array
(
[0] => A:C:1
[1] => B:C:a
[2] => A:2
[3] => B:b
[4] => A:3
[7] => A:4
)
preg_replace returns
Array
(
[0] => A:C:1
[1] => B:C:a
[2] => A:2
[3] => B:b
[4] => A:3
[5] => A
[6] => B
[7] => A:4
)