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
