CODEWITHSUNDEEP
phparraysmultidimensional-arrayheader
Chad
Chad

Reputation: 714

Checking if an index in a multidimensional array is an array

The code:

    $row['text'] = 'http://t.co/iBSiZZD4 and http://t.co/1rG3oNmc and http://t.co/HGFjwqHI and http://t.co/8UldEAVt';

    if(preg_match_all('|http:\/\/t.co\/.{1,8}|i',$row['text'],$matches)){
        foreach($matches[0] as $value){
            $headers = get_headers($value,1);
            if(is_array($headers['Location'])){
                $headers['Location'] = $headers['Location'][0];
            }
            $row['text'] = preg_replace('|http:\/\/t.co\/.{1,8}|i', '<a href="' . $headers['Location'] . '">' . $headers['Location'] . '</a>',$row['text']);
        }
    }

This is related to get_headers(). Sometimes get_headers($url,1) returns an array with a location index key like so: [Location]=>Array([0]=>url1 [1]=>url2). I basically want to make [Location] equal to [Location][0] if [Location][0] exists. However, the above code doesn't seem to accomplish that task. I've also tried array_key_exists() and isset() but neither solved the problem. Thoughts?

Upvotes: 1

Views: 112

Answers (1)

Madara&#39;s Ghost
Madara&#39;s Ghost

Reputation: 175017

Don't try to replace on the fly. First get all the values, and then do the replace in one batch (using two arrays as the $search and $replace parameters).

<?php

    $replace = array();
    $row = array('text' => 'http://t.co/iBSiZZD4 and http://t.co/1rG3oNmc and http://t.co/HGFjwqHI and http://t.co/8UldEAVt');
    if (preg_match_all('|http:\/\/t.co\/.{1,8}|i', $row['text'], $search)) {
        foreach ($search[0] as $value) {
            $headers = get_headers($value, 1);
            if (is_array($headers['Location'])) {
                $headers['Location'] = $headers['Location'][0];
            }
            $replace[] = "<a href='{$headers["Location"]}'>{$headers["Location"]}</a>";
        }
        $row['text'] = str_replace($search[0], $replace, $row['text']);
        echo $row["text"];
    }

P.S. - Next time, please tell us the context of your problem, tell us you "are making a service that resolves shortened URLs", don't let me figure that out from your code alone.

Upvotes: 2

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