PHP preg_match找到多个匹配

Question

正则表达式在PHP中使用preg_match查找多个匹配的字符串的正确语法是什么？

例如，如果发现以下段落中出现两次以下字符串：

$string = "/brown fox jumped [0-9]/"; 

$paragraph = "The brown fox jumped 1 time over the fence. The green fox did not. Then the brown fox jumped 2 times over the fence" 

if (preg_match($string, $paragraph)) { 
echo "match found"; 
}else { 
echo "match NOT found"; 
} 

Answer 1

你想用​​。这是它在代码中的外观。实际的函数返回找到的项目数，但$matches阵列将持有的结果：

<?php 
$string = "/brown fox jumped [0-9]/"; 

$paragraph = "The brown fox jumped 1 time over the fence. The green fox did not. Then the brown fox jumped 2 times over the fence"; 

if (preg_match_all($string, $paragraph, &$matches)) { 
    echo count($matches[0]) . " matches found"; 
}else { 
    echo "match NOT found"; 
} 
?> 

将输出：

2场比赛中