PHP preg_match查找多次出现

发布时间：2020-12-13 13:43:45 所属栏目：PHP教程来源：网络整理

导读：正则表达式在 PHP中使用preg_match查找多次出现的相同字符串的正确语法是什么？例如,查找以下段落中是否出现以下字符串： $string = "/brown fox jumped [0-9]/";$paragraph = "The brown fox jumped 1 time over the fence. The green fox did not. Then t

正则表达式在 PHP中使用preg_match查找多次出现的相同字符串的正确语法是什么？

例如,查找以下段落中是否出现以下字符串：

$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";
}

您想要使用 preg_match_all().以下是代码中的外观.实际函数返回找到的项目数,但$matches数组将保存结果：

<?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 matches found

（编辑：李大同）

【声明】本站内容均来自网络，其相关言论仅代表作者个人观点，不代表本站立场。若无意侵犯到您的权利，请及时与联系站长删除相关内容!