在$ _SERVER [＆＃39; HTTP_REFERER＆＃39;]之前从网址中删除查询

Question

在表单提交成功或失败时，我使用以下内容。生成的网址显示为http://example.com/directory/?success=false

我遇到的问题是，当用户在更正验证错误后再次尝试提交表单时，生成的URL变为http://example.com/directory/?success=false?success=true - 我需要先清除任何查询字符串。我怎么能这样做？

PHP

# Redirect user to error message
 header('Location: ' . $_SERVER['HTTP_REFERER'] . '?success=false');
}

Answer 1

您可以使用explode()来破解$_SERVER['HTTP_REFERRER']字符串以摆脱现有的$_GET参数：

$bits = explode('?',$_SERVER['HTTP_REFERRER']);
$redirect = $bits[0];

# Redirect user to error message
header('Location: ' . $redirect . '?success=true');

Answer 2

这样的事情怎么样：

$i = strchr($_SERVER['HTTP_REFERER'], "?");
$address = substr($_SERVER['HTTP_REFERER'], 0, $i);
header('Location: ' . $address . '?success=false');