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    <p>Your question is followed by incredible buggy code, but here is a fixed code, which return the result you need:</p> <pre><code>&lt;!-- language: lang-php --&gt; &lt;?php // How do I pass an array key to a function to pull up the right key's data? $var['TEST1'] = Array ( 'Description' =&gt; 'This is a Description', 'Version' =&gt; '1.11', 'Fields' =&gt; Array( 'ID' =&gt; array( 'type' =&gt; 'int', 'length' =&gt;'11', 'misc' =&gt;'auto_increment' ), 'DATA' =&gt; array( 'type' =&gt; 'varchar', 'length' =&gt; '255' ) ) ); $var['TEST2'] = Array ( 'Description' =&gt; 'This is the 2nd Description', 'Version' =&gt; '2.1', 'Fields' =&gt; Array( 'ID' =&gt; array( 'type' =&gt; 'int', 'length' =&gt; '11', 'misc' =&gt;'auto_increment' ), 'DATA' =&gt; array( 'type' =&gt; 'varchar', 'length' =&gt; '255' ) ) ); function buildStructure($obj) { global $var; $output = ''; // $primaryKey = $VAR[$obj]['primary key']; // Primary key is not // defined in original array!!! foreach ($var[$obj]['Fields'] as $name =&gt; $tag){ $type = $tag['type']; $length = $tag['length']; $default = (array_key_exists('default', $tag)) ? $tag['default'] : ''; $description = (array_key_exists('description', $tag)) ? $tag['description'] : ''; $length = (isset($length)) ? "({$length})" : ''; $default = ($default == NULL ) ? "NULL" : $default; $output .= "`{$name}` {$type}{$length} DEFAULT {$default} COMMENT `{$description}`, "; } return $output; } $obj = 'TEST1'; echo buildStructure($obj); // output is: // `ID` int(11) DEFAULT NULL COMMENT ``, `DATA` varchar(255) DEFAULT NULL COMMENT ``, ?&gt; </code></pre>
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