preg_match

锟斤拷锟斤拷

pattern

要锟斤拷锟斤拷锟斤拷模式锟斤拷锟街凤拷锟斤拷锟斤拷锟酵★拷

subject

锟斤拷锟斤拷锟街凤拷锟斤拷锟斤拷

matches

锟斤拷锟斤拷峁╋拷瞬锟斤拷锟�matches锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟轿拷锟斤拷锟斤拷锟斤拷锟斤拷 $matches[0]锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷模式匹锟戒到锟斤拷锟侥憋拷锟斤拷 $matches[1] 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匹锟戒到锟斤拷锟侥憋拷锟斤拷锟皆达拷锟斤拷锟狡★拷

flags

flags锟斤拷锟皆憋拷锟斤拷锟斤拷为锟斤拷锟铰憋拷锟街碉拷锟�

PREG_OFFSET_CAPTURE

锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷牵锟斤拷锟斤拷锟矫恳伙拷锟斤拷锟斤拷值锟狡ワ拷浞碉拷锟绞憋拷岣斤拷锟斤拷址锟斤拷锟狡拷锟斤拷锟�(锟斤拷锟斤拷锟侥匡拷锟斤拷址锟斤拷锟斤拷锟�)锟斤拷 注锟解：锟斤拷锟侥憋拷锟斤拷涞�matches锟斤拷锟斤拷锟斤拷锟斤拷锟介，使锟斤拷每锟斤拷元锟截筹拷为一锟斤拷锟斤拷 锟斤拷0锟斤拷元锟斤拷锟斤拷匹锟戒到锟斤拷锟街凤拷锟斤拷锟斤拷锟斤拷1锟斤拷元锟斤拷锟角革拷匹锟斤拷锟街凤拷锟斤拷 锟斤拷目锟斤拷锟街凤拷锟斤拷subject锟叫碉拷偏锟斤拷锟斤拷锟斤拷

<?php
preg_match('/(foo)(bar)(baz)/', 'foobarbaz', $matches, PREG_OFFSET_CAPTURE);
print_r($matches);
?>

锟斤拷锟斤拷锟斤拷锟教伙拷锟斤拷锟斤拷锟�

Array
(
    [0] => Array
        (
            [0] => foobarbaz
            [1] => 0
        )

    [1] => Array
        (
            [0] => foo
            [1] => 0
        )

    [2] => Array
        (
            [0] => bar
            [1] => 3
        )

    [3] => Array
        (
            [0] => baz
            [1] => 6
        )

)

offset

通锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷目锟斤拷锟街凤拷锟斤拷锟侥匡拷始位锟矫匡拷始锟斤拷锟斤拷选锟斤拷锟斤拷 offset 锟斤拷锟斤拷 指锟斤拷锟斤拷目锟斤拷锟街凤拷锟斤拷锟斤拷某锟斤拷位锟矫匡拷始锟斤拷锟斤拷(锟斤拷位锟斤拷锟街斤拷)锟斤拷

Note:

使锟斤拷offset锟斤拷锟斤拷锟斤拷同锟斤拷锟斤拷preg_match() 锟斤拷锟捷帮拷锟斤拷位锟斤拷通锟斤拷substr($subject, $offset)锟斤拷取目锟斤拷锟街凤拷锟斤拷锟斤拷锟斤拷锟� 锟斤拷为pattern锟斤拷锟皆帮拷锟斤拷锟斤拷锟皆憋拷锟斤拷^锟斤拷 $ 锟斤拷锟斤拷(?<=x)锟斤拷 锟饺较ｏ拷

<?php
$subject = "abcdef";
$pattern = '/^def/';
preg_match($pattern, $subject, $matches, PREG_OFFSET_CAPTURE, 3);
print_r($matches);
?>

锟斤拷锟斤拷锟斤拷锟教伙拷锟斤拷锟斤拷锟�

Array
(
)

锟斤拷锟斤拷锟绞撅拷锟绞癸拷媒锟饺★拷蟠锟绞�

<?php
$subject = "abcdef";
$pattern = '/^def/';
preg_match($pattern, substr($subject,3), $matches, PREG_OFFSET_CAPTURE);
print_r($matches);
?>

锟斤拷锟斤拷锟斤拷锟狡ワ拷锟�

Array
(
    [0] => Array
        (
            [0] => def
            [1] => 0
        )

)