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POWordPress, MySQL, php - query results not acting as a string
 

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  1. POWordPress, MySQL, php - query results not acting as a string
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    <p>This is driving me nuts. I've searched for solutions but can't figure out what's wrong.</p> <p>The situation... I have an SQL query running in WordPress, as follows:</p> <pre><code>SELECT distinct guid FROM $wpdb-&gt;posts WHERE post_status = 'inherit' AND guid is not null </code></pre> <p>Dead simple. It returns a single column which contains a list of all the attachment media files currently stored on the system (well, not all of them, but it'll do as an explanation).</p> <p>In a WP plugin function, I run the query:</p> <pre><code>$media_library_files = $wpdb-&gt;get_col($get_all_media,0); </code></pre> <p>That returns an array (I don't want an object) with values like:</p> <pre><code>[0] =&gt; http://mysitename.com/wp-content/uploads/2013/05/thumb_littlefile_blah.jpg </code></pre> <p>Then I want to process each one so that there's just the filename left. The problem is that, when I run a str_replace or pretty much any other string function on the contents, it doesn't work. For example:</p> <pre><code>$horrid_bit = 'http://mysitename.com/wp-content/uploads/2013/05/'; foreach($media_library_files as $item) { $item = str_replace($horrid_bit,'',$item); } </code></pre> <p>When I print_r the array after that, there's no visible change - every line is exactly the same as it was before.</p> <p>I've tried using a (string) to cast $item, I've tried defining variables to do that, then working the str_replace on them, I've tried... loads of different things.</p> <p>I have a feeling I'm missing something really simple, but I just can't see it. Is it because the column is varchar in the original table? Or something else?</p> <p>Any help appreciated. Thanks!</p>
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    1. USSpike --
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    1. COHave a look at [the `foreach` docs](http://us1.php.net/manual/en/control-structures.foreach.php) (the first listed example) You need to iterate over it with `&$item` as a reference to be able to modify the array in place.
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      1. POWordPress, MySQL, php - query results not acting as a string
      1. USMichael Berkowski
    2. COI also recommend [`basename()`](http://us1.php.net/manual/en/function.basename.php) instead of `str_replace()` to get just the filename part.
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      1. POWordPress, MySQL, php - query results not acting as a string
      1. USMichael Berkowski
    3. COAhhhh, so simple. I knew I was being daft. I didn't think basename would work on URLs, but it apparently does, so a double thank-you for that!
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      1. USSpike --
 

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