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POHow to process a large post array in PHP where item names are all different and not known in advance?
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  1. POHow to process a large post array in PHP where item names are all different and not known in advance?
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    copied!<p>I have a PHP page that queries a DB to populate a form for the user to modify the data and submit.<br> The query returns a number of rows which contain 3 items:</p> <ol> <li>ImageID</li> <li>ImageName</li> <li>ImageDescription</li> </ol> <p>The PHP page titles each box in the form with a generic name and appends the ImageID to it. Ie:</p> <ul> <li>ImageID_03</li> <li>ImageName_34</li> <li>ImageDescription_22</li> </ul> <p>As it's unknown which images are going to have been retrieved from the DB then I can't know in advance what the name of the form entries will be. The form deals with a large number of entries at the same time.</p> <p>My backend PHP form processor that gets the data just sees it as one big array:</p> <pre><code>[imageid_2] =&gt; 2 [imagename_2] =&gt; _MG_0214 [imageid_10] =&gt; 10 [imagename_10] =&gt; _MG_0419 [imageid_39] =&gt; 39 [imagename_39] =&gt; _MG_0420 [imageid_22] =&gt; 22 [imagename_22] =&gt; Curly Fern [imagedescription_2] =&gt; Wibble [imagedescription_10] =&gt; Wobble [imagedescription_39] =&gt; Fred [imagedescription_22] =&gt; Sally </code></pre> <p>I've tried to do an array walk on it to split it into 3 arrays which set places but am stuck:</p> <pre><code>// define empty arrays $imageidarray = array(); $imagenamearray = array(); $imagedescriptionarray = array(); // our function to call when we walk through the posted items array function assignvars($entry, $key) { if (preg_match("/imageid/i", $key)) { array_push($imageidarray, $entry); } elseif (preg_match("/imagename/i", $key)) { // echo " ImageName: $entry"; } elseif (preg_match("/imagedescription/i", $key)) { // echo " ImageDescription: $entry"; } } array_walk($_POST, 'assignvars'); </code></pre> <p>This fails with the error:<br> array_push(): First argument should be an array in...</p> <p>Am I approaching this wrong?</p>
 

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