此模式的 preg_match_all答案

【问题标题】：preg_match_all for this pattern此模式的 preg_match_all
【发布时间】：2014-04-09 04:24:35
【问题描述】：

我有这个模式，我想用它来提取 /image/ 字段之后的数字，我已经尝试过这个模式，我已经在http://www.functions-online.com/preg_match_all.html 在线检查，它为第一个链接提供了所需的输出，但对于其他链接没有提供所需的输出这是我的模式

  /\sample.com\/image\/(.*)\//

这是我的字符串

     Mario Ermito photos by sample.com Mario Ermito Latest News, Photos, Biography, Videos and Wallpapers [img]http://xyz.sample.com/image/4205476/600full-mario-ermito.jpg[/img][img]http://xyz.sample.com/image/4453948/600full-my-profile.jpg[/img][img]http://xyz.sample.com/image/427185/600full-eagle-eye-poster.jpg[/img][img]http://xyz.sample.com/image/1323868/600full-alexis-bledel.jpg[/img][img]http://xyz.sample.com/image/2505314/600full-monroe-lee.jpg[/img][img]http://xyz.sample.com/image/3300481/600full-cindy-crawford.jpg[/img][img]http://xyz.sample.com/image/1046646/600full-pitura-freska.jpg[/img][img]http://xyz.sample.com/image/4322305/600full-kristin-kreuk.jpg[/img][img]http://xyz.sample.com/image/4261476/600full-kang-so--ra.jpg[/img][img]http://xyz.sample.com/image/3386911/600full-summer-brielle.jpg[/img][img]http://xyz.sample.com/image/4663949/600full-the-closer-artwork.jpg[/img]

例如

我只想在 /image/ 字段之后提取数字我不想要图像名称我想要的输出是

     4205476
     4453948
      427185

等所有字符串中的数字

【问题讨论】：

标签： php preg-match preg-match-all

【解决方案1】：

使用这个正则表达式~\/\image\/(.*?)\/~

<?php
$str='     Mario Ermito photos by sample.com Mario Ermito Latest News, Photos, Biography, Videos and Wallpapers [img]http://xyz.sample.com/image/4205476/600full-mario-ermito.jpg[/img][img]http://xyz.sample.com/image/4453948/600full-my-profile.jpg[/img][img]http://xyz.sample.com/image/427185/600full-eagle-eye-poster.jpg[/img][img]http://xyz.sample.com/image/1323868/600full-alexis-bledel.jpg[/img][img]http://xyz.sample.com/image/2505314/600full-monroe-lee.jpg[/img][img]http://xyz.sample.com/image/3300481/600full-cindy-crawford.jpg[/img][img]http://xyz.sample.com/image/1046646/600full-pitura-freska.jpg[/img][img]http://xyz.sample.com/image/4322305/600full-kristin-kreuk.jpg[/img][img]http://xyz.sample.com/image/4261476/600full-kang-so--ra.jpg[/img][img]http://xyz.sample.com/image/3386911/600full-summer-brielle.jpg[/img][img]http://xyz.sample.com/image/4663949/600full-the-closer-artwork.jpg[/img]';
preg_match_all('~\/\image\/(.*?)\/~', $str, $matches);
print_r($matches[1]);

OUTPUT :

Array
(
    [0] => 4205476
    [1] => 4453948
    [2] => 427185
    [3] => 1323868
    [4] => 2505314
    [5] => 3300481
    [6] => 1046646
    [7] => 4322305
    [8] => 4261476
    [9] => 3386911
    [10] => 4663949
)

【讨论】：

你能告诉我这〜会做什么。我试过类似的，但我的没有用，你的工作很好
~ 是正则表达式的分隔符。你甚至可以使用@
@sachin，你没有在.com 之前用反斜杠转义，那是你的问题。这也是一个正确的。 ~sample\.com\/image\/(.*?)\/~
我已经接受了答案。我还没有为你的答案做任何投票等。谢谢
我不是说你，投票需要 125 声望，所以不是你 :)

【解决方案2】：

你需要调整你的正则表达式：

$regex = '@sample\.com/image/([0-9]+)/@'

preg_match_all('@sample\.com/image/([0-9]+)/@', $str, $m);
print_r($m);

预期输出：

Array
(
    [0] => Array
        (
            [0] => sample.com/image/4205476/
            [1] => sample.com/image/4453948/
            [2] => sample.com/image/427185/
            [3] => sample.com/image/1323868/
            [4] => sample.com/image/2505314/
            [5] => sample.com/image/3300481/
            [6] => sample.com/image/1046646/
            [7] => sample.com/image/4322305/
            [8] => sample.com/image/4261476/
            [9] => sample.com/image/3386911/
            [10] => sample.com/image/4663949/
        )

    [1] => Array
        (
            [0] => 4205476
            [1] => 4453948
            [2] => 427185
            [3] => 1323868
            [4] => 2505314
            [5] => 3300481
            [6] => 1046646
            [7] => 4322305
            [8] => 4261476
            [9] => 3386911
            [10] => 4663949
        )

)

现在您需要记住，PHP 将返回它匹配的所有内容，包括正则表达式字符串中不需要的部分。

来自 PHP 手册： http://www.php.net/manual/en/function.preg-match-all.php

排序结果使得 $matches[0] 是一个完整模式的数组匹配，$matches[1] 是第一个匹配的字符串数组带括号的子模式，等等。

【讨论】：

【解决方案3】：

试试这个：

/.*sample\.com\/image\/(\d+)\/.*/

Debuggex Demo

【讨论】：