Check in PHP if a specific query is in URL

Question

I am trying to check if a URL has a specific query within a URL with multiple parameters:

$parts = parse_url('http://my url?queryA=valueA&queryB=valueB&queryC=valueC ....');
parse_str($parts['query'], $query);

I have used the below to get the value of the query;

$query['queryA']//outputs valueA

However, I want to check if "queryA" is indeed within the URL queries:

echo $parts['query'] // Outputs the full query - queryA=valueA&queryB=valueB&queryC=valueC

// Trying for
if($parts['query'] == 'queryA') {
    // queryA is in the URL
}

google: "PHP check variable exists" ... Result #1 - Example #1 part II shows you how to check this for arrays. — Ash
– Ash, Commented Apr 30, 2016 at 12:39
@ash That possible duplicate you say (or think) it is; that other question is about checking if something isset() and not about parsing a url. Hardly a duplicate in my view, just because the accepted answer contains array_key_exists() isn't related between both questions. Two different animals here. Plus, that other question doesn't even mention parse_url(). Best to dig a bit deeper if you're going to mark a question as a duplicate. ;-) — Funk Forty Niner
– Funk Forty Niner, Commented Apr 30, 2016 at 13:06
@Fred-ii- It is not use the use of isset over array_key_exists, the OP is trying to determine if a variable exists before using it - therefore, this question shows little effort from the OP to search google and find the answer themselves. The duplicate does show how to test if a variable exists - it may not be 100% the same words but it certainly is 100% the same solution. — Ash
– Ash, Commented Apr 30, 2016 at 13:09
@ash Well, nobody else thought it was a duplicate (so far anyway), as it wasn't upvoted. If someone does (eventually) upvote it and more than once, sure... why not. Just "my 2 cents" on it though. ;-) — Funk Forty Niner
– Funk Forty Niner, Commented Apr 30, 2016 at 13:11
@Fred-ii- sure, and we could be splitting at hairs. I personally think the reputation rewards for this level of laziness is unacceptable; but then again it's not my call, just my opinion on the matter. — Ash
– Ash, Commented Apr 30, 2016 at 13:14

Saty · Accepted Answer · 2016-04-30 12:34:29Z

4

Use array_key_exists to check queryA key present in $query array

$parts = parse_url('http://my url?queryA=valueA&queryB=valueB&queryC=valueC');
parse_str($parts['query'], $query);
if (array_key_exists('queryA', $query)) {
    echo "queryA element is in the array";
}

answered Apr 30, 2016 at 12:34

Saty

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1 Comment

Ash Over a year ago

Great answer, not going to up-vote since this question should be closed.

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