php正则表达式失败

Question

我正在尝试匹配字符串，但它会进入最后一个 else 循环。你能提供任何帮助吗？

$cstg = "<result>True<\/result>";

if (preg_match("/<result>True<\/result>/", $cstg)) {
    echo "result success";
}
else if (preg_match("/\<result\>False\<\/result\>/", $cstg)) {
    echo "result fail";
}
else {
    echo "Something went wrong.";
}

Answer 1

问题来自您的 $cstg 字符串。您不必在 html 文本中转义\。所以下面的代码工作正常:

$cstg = "<result>True</result>";

if( preg_match("/<result>True<\/result>/", $cstg)){
    echo "result success";
}
elseif  (preg_match("/\<result\>False\<\/result\>/", $cstg)){
    echo "result fail";
}else{
    echo "Something went wrong.";
}