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POPHP Array Losing Values Outside of Function
 

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    <p>Hey guys I have a weird problem trying to use a global array in php.</p> <p>I don't even really want to use a global but here's what i'm trying to do.</p> <p>I have 2 functions</p> <p>createMatrix($name) which creates a 5x5 matrix of texts boxes and remembers values loadMatrix($name) which loads a 5x5 matrix from post data.</p> <p>For some reason, after I run loadMatrix(), the values I set are lost in createMatrix()</p> <p>I've tried a ton of debugging methods and declaring my matrix variables as globals but no luck. I know it's a scope issue because when I tried running everything outside of the functions it worked just fine.</p> <pre><code>&lt;form action="Program4.php" method="post"&gt; &lt;?php $matrixa = array(array()); $matrixb = array(array()); if($_POST['add']) echo "Add Clicked"; if($_POST['subtract']) echo "Subtract Clicked"; function loadArrays($name1,$name2) { //The Solution: global $matrixa, $matrixb; for($x = 0; $x &lt; 5; $x++) for($y = 0; $y &lt; 5; $y++) { $matrixa[$x][$y] = $_POST[$name1 . $x . $y]; $matrixb[$x][$y] = $_POST[$name2 . $x . $y]; } } function createMatrix($name) { //The Solution: global $matrixa, $matrixb; echo "&lt;h2&gt;" . $name . "&lt;/h2&gt;\n"; for($x = 0; $x &lt; 5; $x++) echo $matrixa[0][$x]; echo "&lt;div style=\"border:ridge; border-width:7px; padding:12px; float:left; background-color:gray\"&gt;\n"; for($x = 0; $x &lt; 5; $x++) { for($y = 0; $y &lt; 5; $y++) { echo "&lt;input type=\"text\" name=\"" . $name . $x . $y . "\" maxlength=\"6\" style=\"width:50px\" value=\""; if($name == "MatrixA") echo "" . $matrixa[$x][$y]; else if($name == "MatrixB") echo "" . $matrixb[$x][$y]; echo "\"&gt;\n"; } echo "&lt;br&gt;\n"; } echo "&lt;/div&gt;\n"; echo "&lt;br&gt;&lt;br&gt;&lt;br&gt;&lt;br&gt;&lt;br&gt;&lt;br&gt;&lt;br&gt;&lt;br&gt;&lt;br&gt;\n"; } loadArrays("MatrixA","MatrixB"); createMatrix("MatrixA"); createMatrix("MatrixB"); ?&gt; &lt;input type="submit" value="Add Matrices" name="add" /&gt; &lt;input type="submit" value="Subtract Matrices" name="subtract" /&gt; &lt;/form&gt; </code></pre> <p>This project is due at midnight so I'd appreciate some help :)</p> <p>Basically the problem is trying to save the values. I am able to load the variables from post data into the arrays using loadArrays() just fine, but the values don't show up AT ALL when I use createMatrix();</p>
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      1. VTUpMod
    1. COI don't see you define `loadMatrix()` anywhere on your code.
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      1. USMadara Uchiha
    2. COBefore using a global variable inside a function. Do this: `global $matrixa;`
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      1. USBjørne Malmanger
    3. COYou also forgot a ; at the end of loadMatrix("MatrixA","MatrixB")
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      1. USMattias
 

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