通锟斤拷一锟斤拷锟斤拷锟斤拷锟斤拷式锟街革拷锟街凤拷锟斤拷

说锟斤拷

preg_split ( string $pattern , string $subject [, int $limit = -1 [, int $flags = 0 ]] ) : array

通锟斤拷一锟斤拷锟斤拷锟斤拷锟斤拷式锟街革拷锟斤拷锟斤拷锟街凤拷锟斤拷.

锟斤拷锟斤拷

pattern

锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷模式锟斤拷锟街凤拷锟斤拷锟斤拷式锟斤拷

subject

锟斤拷锟斤拷锟街凤拷锟斤拷

limit

锟斤拷锟街革拷锟斤拷锟斤拷锟斤拷锟斤拷品指锟斤拷玫锟斤拷锟斤拷哟锟斤拷锟斤拷只锟斤拷limit锟斤拷锟斤拷锟斤拷锟截碉拷锟斤拷锟揭伙拷锟� 锟接达拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷剩锟洁部锟街★拷limit值为-1锟斤拷 0锟斤拷null时锟斤拷锟斤拷锟斤拷"锟斤拷锟斤拷锟斤拷"锟斤拷锟斤拷为php锟侥憋拷准锟斤拷锟斤拷锟斤拷锟绞癸拷锟絥ull锟斤拷锟斤拷锟斤拷flags锟斤拷锟斤拷锟矫★拷

flags

flags 锟斤拷锟斤拷锟斤拷锟轿猴拷锟斤拷锟斤拷锟角碉拷锟斤拷锟�(锟斤拷位锟斤拷锟斤拷锟斤拷 | 锟斤拷锟�)锟斤拷

PREG_SPLIT_NO_EMPTY: 锟斤拷锟斤拷锟斤拷锟斤拷潜锟斤拷锟斤拷茫锟� preg_split() 锟斤拷锟斤拷锟斤拷锟截分革拷锟斤拷姆强詹锟斤拷帧锟�
PREG_SPLIT_DELIM_CAPTURE: 锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷耍锟斤拷锟斤拷诜指锟斤拷锟侥Ｊ斤拷械锟斤拷锟斤拷疟锟斤拷式锟斤拷锟斤拷锟斤拷锟今并凤拷锟截★拷
PREG_SPLIT_OFFSET_CAPTURE: 锟斤拷锟斤拷锟斤拷锟斤拷潜锟斤拷锟斤拷锟�, 锟斤拷锟斤拷每一锟斤拷锟斤拷锟街碉拷匹锟戒返锟斤拷时锟斤拷锟结附锟斤拷锟街凤拷锟斤拷偏锟斤拷锟斤拷. 注锟解：锟解将锟斤拷谋浞碉拷锟斤拷锟斤拷锟斤拷械锟矫恳伙拷锟皆拷锟�, 使锟斤拷每锟斤拷元锟截筹拷为一锟斤拷锟缴碉拷0 锟斤拷元锟斤拷为锟街革拷锟斤拷锟斤拷哟锟斤拷锟斤拷锟�1锟斤拷元锟斤拷为锟斤拷锟接达拷锟斤拷subject 锟叫碉拷偏锟斤拷锟斤拷锟斤拷傻锟斤拷锟斤拷椤�

锟斤拷锟斤拷值

锟斤拷锟斤拷一锟斤拷使锟斤拷 pattern 锟竭斤拷指锟� subject 锟斤拷玫锟� 锟斤拷锟接达拷锟斤拷傻锟斤拷锟斤拷椋� 锟斤拷锟斤拷锟斤拷失锟斤拷时锟斤拷锟斤拷 FALSE锟斤拷

锟斤拷锟斤拷

Example #1 preg_split()示锟斤拷锟斤拷锟斤拷取锟斤拷锟斤拷锟街凤拷锟斤拷锟侥诧拷锟斤拷


<?php
//使锟矫讹拷锟脚伙拷崭锟�(锟斤拷锟斤拷" ", \r, \t, \n, \f)锟街革拷锟斤拷锟斤拷
$keywords = preg_split("/[\s,]+/", "hypertext language, programming");
print_r($keywords);
?>

锟斤拷锟斤拷锟斤拷锟教伙拷锟斤拷锟斤拷锟�

Array
(
    [0] => hypertext
    [1] => language
    [2] => programming
)

Example #2 锟斤拷一锟斤拷锟街凤拷锟斤拷锟街革拷为锟斤拷锟斤拷锟斤拷锟斤拷址锟�


<?php
$str = 'string';
$chars = preg_split('//', $str, -1, PREG_SPLIT_NO_EMPTY);
print_r($chars);
?>

锟斤拷锟斤拷锟斤拷锟教伙拷锟斤拷锟斤拷锟�

Array
(
    [0] => s
    [1] => t
    [2] => r
    [3] => i
    [4] => n
    [5] => g
)

Example #3 锟街革拷一锟斤拷锟街凤拷锟斤拷锟斤拷锟斤拷取每锟斤拷锟街碉拷偏锟斤拷锟斤拷


<?php
$str = 'hypertext language programming';
$chars = preg_split('/ /', $str, -1, PREG_SPLIT_OFFSET_CAPTURE);
print_r($chars);
?>

锟斤拷锟斤拷锟斤拷锟教伙拷锟斤拷锟斤拷锟�

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

    [1] => Array
        (
            [0] => language
            [1] => 10
        )

    [2] => Array
        (
            [0] => programming
            [1] => 19
        )

)

注锟斤拷

Tip

锟斤拷锟斤拷悴伙拷锟揭拷锟斤拷锟斤拷锟绞斤拷锟斤拷埽锟斤拷锟斤拷锟斤拷懈锟斤拷锟�(锟斤拷锟揭革拷锟斤拷)锟斤拷选锟斤拷锟斤拷锟� explode() 锟斤拷 str_split()锟斤拷

Tip

锟斤拷锟矫伙拷谐晒锟狡ワ拷洌拷锟斤拷岱碉拷锟揭伙拷锟斤拷锟斤拷椋拷锟斤拷锟斤拷说锟斤拷锟皆拷兀锟斤拷锟斤拷锟斤拷锟斤拷锟街凤拷锟斤拷锟斤拷

锟轿硷拷

PCRE 模式
preg_quote() - 转锟斤拷锟斤拷锟斤拷锟斤拷式锟街凤拷
implode() - 锟斤拷一锟斤拷一维锟斤拷锟斤拷锟街底拷锟轿拷址锟斤拷锟�
preg_match() - 执锟斤拷匹锟斤拷锟斤拷锟斤拷锟斤拷式
preg_match_all() - 执锟斤拷一锟斤拷全锟斤拷锟斤拷锟斤拷锟斤拷式匹锟斤拷
preg_replace() - 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斤拷锟芥换
preg_last_error() - 锟斤拷锟斤拷锟斤拷锟揭伙拷锟絇CRE锟斤拷锟斤拷执锟叫诧拷锟斤拷锟侥达拷锟斤拷锟斤拷锟�