preg_match，pattern，php

Question

我試圖從html內容中提取一些特定的圖片。目前我有以下陣列

 
    [1] => Array 
     (
      [0] => BuEZm5g!Wk~$(KGrHqQH-DgEvrb2CLuOBL-vbkHlKw~~_14.JPG#!BuEZm5g!Wk~$(KGrHqQH-DgEvrb2CLuOBL-vbkHlKw~~_12.JPG|1#http://i.ebayimg.com/08#!BuEZqMQBGk~$(KGrHqQH-DoEvrKYSoPiBL-vb)WgLw~~_14.JPG#!BuEZqMQBGk~$(KGrHqQH-DoEvrKYSoPiBL-vb)WgLw~~_12.JPG|2#http://i.ebayimg.com/13#!BuEZtkw!2k~$(KGrHqYH-EYEvsh4EjJSBL-vb-bLow~~_14.JPG#!BuEZtkw!2k~$(KGrHqYH-EYEvsh4EjJSBL-vb-bLow~~_12.JPG|3#http://i.ebayimg.com/03#!BuEZ)!wEGk~$(KGrHqYH-DwEvq8Z1JuQBL-vcMOoFQ~~_14.JPG#!BuEZ)!wEGk~$(KGrHqYH-DwEvq8Z1JuQBL-vcMOoFQ~~_12.JPG|4#http://i.ebayimg.com/09#!BuEZ1IQEGk~$(KGrHqEH-D0EvqwClvviBL-vcclJwg~~_14.JPG#!BuEZ1IQEGk~$(KGrHqEH-D0EvqwClvviBL-vcclJwg~~_12.JPG|5#http://i.ebayimg.com/17#!BuEZ4FQCWk~$(KGrHqUH-DMEvS+,FRj5BL-vco)Qgg~~_14.JPG#!BuEZ4FQCWk~$(KGrHqUH-DMEvS+,FRj5BL-vco)Qgg~~_12.JPG|6#http://i.ebayimg.com/17#!BuEZ7FQEWk~$(KGrHqYH-EYEvsh4EjJSBL-vc1v2Hg~~_14.JPG#!BuEZ7FQEWk~$(KGrHqYH-EYEvsh4EjJSBL-vc1v2Hg~~_12.JPG|7#http://i.ebayimg.com/12#!BuEZ-c!Bmk~$(KGrHqQH-CYEvr5z9)NVBL-vdC,)Mg~~_14.JPG#!BuEZ-c!Bmk~$(KGrHqQH-CYEvr5z9)NVBL-vdC,)Mg~~_12.JPG|8#http://i.ebayimg.com/20#!BuE,CNgCWk~$(KGrHqIH-CIEvqKBurmhBL-vdRBe3!~~_14.JPG#!BuE,CNgCWk~$(KGrHqIH-CIEvqKBurmhBL-vdRBe3!~~_12.JPG|9#http://i.ebayimg.com/24#!BuE,FN!EWk~$(KGrHqUH-C0EvsBdjbv0BL-vdeFkD!~~_14.JPG#!BuE,FN!EWk~$(KGrHqUH-C0EvsBdjbv0BL-vdeFkD!~~_12.JPG|10#http://i.ebayimg.com/16#!BuE,IOgBmk~$(KGrHqEH-EMEvpym7mSLBL-vdqI6nw~~_14.JPG#!BuE,IOgBmk~$(KGrHqEH-EMEvpym7mSLBL-vdqI6nw~~ 
     ) 

我只需要提取以圖片開始！並在12.JPG結束。預期結果的一個例子是 ！BuEZm5g！Wk〜$（KGrHqQH-DgEvrb2CLuOBL-vbkHlKw ~~ _12.JPG 。我有一個模式，但由於某些原因，我不知道它的工作原理，它是

 
$pattern = "/#\!(.*)_12.JPG/"; 

預先感謝您的任何幫助

Answer 1

使用'/#\!([^_]+)_12.JPG/'，而不是嘗試。另外，你使用preg_match_all吧？

例..

<?php 
$input = '(that long string you have)'; 
$matches = array(); 
preg_match_all('/#\!([^_]+)_12.JPG/', $input, $matches); 
var_dump($matches); 

輸出（注意如何$matches[0]包含所有完全匹配，並且$matches[1]包含所有分組（最多_12.JPG）匹配）..

array(2) { 
    [0]=> 
    array(10) { 
    [0]=> 
    string(53) "#!BuEZm5g!Wk~$(KGrHqQH-DgEvrb2CLuOBL-vbkHlKw~~_12.JPG" 
    [1]=> 
    string(53) "#!BuEZqMQBGk~$(KGrHqQH-DoEvrKYSoPiBL-vb)WgLw~~_12.JPG" 
    [2]=> 
    string(53) "#!BuEZtkw!2k~$(KGrHqYH-EYEvsh4EjJSBL-vb-bLow~~_12.JPG" 
    [3]=> 
    string(53) "#!BuEZ)!wEGk~$(KGrHqYH-DwEvq8Z1JuQBL-vcMOoFQ~~_12.JPG" 
    [4]=> 
    string(53) "#!BuEZ1IQEGk~$(KGrHqEH-D0EvqwClvviBL-vcclJwg~~_12.JPG" 
    [5]=> 
    string(53) "#!BuEZ4FQCWk~$(KGrHqUH-DMEvS+,FRj5BL-vco)Qgg~~_12.JPG" 
    [6]=> 
    string(53) "#!BuEZ7FQEWk~$(KGrHqYH-EYEvsh4EjJSBL-vc1v2Hg~~_12.JPG" 
    [7]=> 
    string(53) "#!BuEZ-c!Bmk~$(KGrHqQH-CYEvr5z9)NVBL-vdC,)Mg~~_12.JPG" 
    [8]=> 
    string(53) "#!BuE,CNgCWk~$(KGrHqIH-CIEvqKBurmhBL-vdRBe3!~~_12.JPG" 
    [9]=> 
    string(53) "#!BuE,FN!EWk~$(KGrHqUH-C0EvsBdjbv0BL-vdeFkD!~~_12.JPG" 
    } 
    [1]=> 
    array(10) { 
    [0]=> 
    string(44) "BuEZm5g!Wk~$(KGrHqQH-DgEvrb2CLuOBL-vbkHlKw~~" 
    [1]=> 
    string(44) "BuEZqMQBGk~$(KGrHqQH-DoEvrKYSoPiBL-vb)WgLw~~" 
    [2]=> 
    string(44) "BuEZtkw!2k~$(KGrHqYH-EYEvsh4EjJSBL-vb-bLow~~" 
    [3]=> 
    string(44) "BuEZ)!wEGk~$(KGrHqYH-DwEvq8Z1JuQBL-vcMOoFQ~~" 
    [4]=> 
    string(44) "BuEZ1IQEGk~$(KGrHqEH-D0EvqwClvviBL-vcclJwg~~" 
    [5]=> 
    string(44) "BuEZ4FQCWk~$(KGrHqUH-DMEvS+,FRj5BL-vco)Qgg~~" 
    [6]=> 
    string(44) "BuEZ7FQEWk~$(KGrHqYH-EYEvsh4EjJSBL-vc1v2Hg~~" 
    [7]=> 
    string(44) "BuEZ-c!Bmk~$(KGrHqQH-CYEvr5z9)NVBL-vdC,)Mg~~" 
    [8]=> 
    string(44) "BuE,CNgCWk~$(KGrHqIH-CIEvqKBurmhBL-vdRBe3!~~" 
    [9]=> 
    string(44) "BuE,FN!EWk~$(KGrHqUH-C0EvsBdjbv0BL-vdeFkD!~~" 
    } 
} 

Answer 2

不是一個正則表達式的問題。

$names = explode('#', $names); 
$keep = array(); 

foreach ($names as $name) 
{ 
    if ((substr($name, 0, 1) == '!') && (substr($name, -6) == '12.JPG')) 
    { 
     $keep[] = $name; 
    } 
}