PHP：如何获取preg_match_all的字符串索引？

发布时间：2020-12-13 22:41:44 所属栏目：PHP教程来源：网络整理

导读：假设我有两个正则表达式, /eat (apple|pear)//I like/ 和文字 "I like to eat apples on a rainy day,but on sunny days,I like to eat pears." 我想要的是使用preg_match获取以下索引： match: 0,5 (I like)match: 10,19 (eat apples)match: 57,62 (I like)

假设我有两个正则表达式,

/eat (apple|pear)/
/I like/

和文字

"I like to eat apples on a rainy day,but on sunny days,I like to eat pears."

我想要的是使用preg_match获取以下索引：

match: 0,5 (I like)
match: 10,19 (eat apples)
match: 57,62 (I like)
match: 67,75 (eat pears)

有没有办法使用preg_match_all获取这些索引,而不是每次循环文本？

编辑：解决方案PREG_OFFSET_CAPTURE！

您可以尝试 preg_match()的PREG_OFFSET_CAPTURE标志：

$subject="I like to eat apples on a rainy day,I like to eat pears.";
$pattern = '/eat (apple|pear)/';
preg_match($pattern,$subject,$matches,PREG_OFFSET_CAPTURE );
print_r($matches);

产量

$php test.php
Array
(
    [0] => Array
        (
            [0] => eat apple
            [1] => 10
        )

    [1] => Array
        (
            [0] => apple
            [1] => 14
        )

)

（编辑：李大同）

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