使用preg_match 函数的话,匹配总是不成功
<?php
if (preg_match("/([ab])\1/", "abcdebbcde")) {
echo "A match was found.";
} else {
echo "A match was not found.";
}
?>
返回信息
A match was not found. 为什么?
使用preg_match 函数的话,匹配总是不成功
<?php
if (preg_match("/([ab])\1/", "abcdebbcde")) {
echo "A match was found.";
} else {
echo "A match was not found.";
}
?>
返回信息
A match was not found. 为什么?