使用 preg_match_all 時遇到問題

Question

如何使用preg_match_all函數從以下示例中檢索所有顏色：

Name: jonathan
Color: blue
Gender: male
=========================
Name: anthony
Color: yellow
Gender: male
=========================
Name: sandra
Color: pink
Gender: female
=========================
Name: marry
Color: white
Gender: female
=========================
Name: david
Color: black
Gender: male
=========================

謝謝你的幫助。

Answer 1

您可以通過這種方式捕獲顏色后跟單詞Color:

<?php

$re = '/Color: (.*)/m';
$str = 'Name: jonathan
Color: blue

Gender: male
Name: anthony
Color: yellow

Gender: male
Name: sandra
Color: pink

Gender: female
Name: marry
Color: white

Gender: female
Name: david
Color: black

Gender: male';

preg_match_all($re, $str, $matches, PREG_SET_ORDER, 0);

// Print the entire match result
// Print the entire match result
foreach($matches as $match){
    echo $match[1].PHP_EOL;
}

Answer 2

關於您要處理的數據類型（字符串、對象、數組等）的問題還不夠清楚，但是如果您正在處理字符串，請嘗試

preg_match_all ('/(C|c)olor:\w*?\s.*/m', $yourString, $resultArray)

php 中的preg_match_all通過字符串中的表達式返回所有匹配項的數組，在這種情況下，它將是字符串中的所有顏色。

完整的例子可以是

<?php

$myString = 
'Name: jonathan
Color: blue

Gender: male
Name: anthony
Color: yellow

Gender: male
Name: sandra
Color: pink';

preg_match_all('/(C|c)olor:\w*?\s.*/m', $myString, $resultArray);

<pre>
printr($resultArray)
</pre>

?>