PHP从字符串中删除子字符串

Hey, I need to delete a part of a string (I'm not a :

$content = "user=predator1&scode=mau4&athleteid=17007";

$content = "user=predator1&athleteid=17007";

I need to delete the "$code=XXXXX" part (the XXXXX part is variable)

I've tried using this:

$content = preg_replace("/&scode=[^a-z]*/", "", $content); 

but doesn't work...

How can I solve this problem?

Thank you!!!

There is probably a simpler/faster method that involves regex but this method is safe (parse_str ensures the query string is properly parsed).

$content = "user=predator1&scode=mau4&athleteid=17007";

parse_str($content, $vars);

if (isset($vars['code']))
{
 unset($vars['code']);
}

$content = http_build_query($vars);

var_dump($content);

Docs for parse_str: http://www.php.net/manual/en/function.parse-str.php

Shouldn't "/&scode=[^a-z]*/" be more like "/&scode=[a-zA-Z0-9]*/"?

This would work without using a regular expression:

$pre = "user=predator1&scode=mau4&athleteid=17007";
$exp = explode('&', $pre);
$content = implode('&', array($exp[0], $exp[2]));

preg_replace("/code=[a-zA-Z0-9]*/", "code=", $content); 

$content = preg_replace("|&scode=[a-zA-Z0-9]+&|", '&', $content);

You should try this line:

 $content = preg_replace("/&scode=[a-zA-Z0-9]*/", "", $content); 

It says to remove anything which starts with &scode which is followed by any number of lowercase letter, uppercase letters, or numbers.

In your original code, you were using [^a-z]*. The ^ in your character list said to not match on any lowercase letters, so it would stop replacing content as soon as it saw a lowercase letter. Basically, your regex would remove only numbers that started a code, but wouldn't remove anything else in the code if it included a lowercase character.

My regex above is an inclusive list, saying to remove anything that's on the list, so it will remove any alphanumeric character.

Hope that helps.