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    <p>My list.. most of them fall more under the "hidden features" than the "favorite features" (I hope!), and not all are useful, but .. yeah. </p> <pre><code>// swap values. any number of vars works, obviously list($a, $b) = array($b, $a); // nested list() calls "fill" variables from multidim arrays: $arr = array( array('aaaa', 'bbb'), array('cc', 'd') ); list(list($a, $b), list($c, $d)) = $arr; echo "$a $b $c $d"; // -&gt; aaaa bbb cc d // list() values to arrays while (list($arr1[], $arr2[], $arr3[]) = mysql_fetch_row($res)) { .. } // or get columns from a matrix foreach($data as $row) list($col_1[], $col_2[], $col_3[]) = $row; // abusing the ternary operator to set other variables as a side effect: $foo = $condition ? 'Yes' . (($bar = 'right') &amp;&amp; false) : 'No' . (($bar = 'left') &amp;&amp; false); // boolean False cast to string for concatenation becomes an empty string ''. // you can also use list() but that's so boring ;-) list($foo, $bar) = $condition ? array('Yes', 'right') : array('No', 'left'); </code></pre> <p>You can nest ternary operators too, comes in handy sometimes.</p> <pre><code>// the strings' "Complex syntax" allows for *weird* stuff. // given $i = 3, if $custom is true, set $foo to $P['size3'], else to $C['size3']: $foo = ${$custom?'P':'C'}['size'.$i]; $foo = $custom?$P['size'.$i]:$C['size'.$i]; // does the same, but it's too long ;-) // similarly, splitting an array $all_rows into two arrays $data0 and $data1 based // on some field 'active' in the sub-arrays: foreach ($all_rows as $row) ${'data'.($row['active']?1:0)}[] = $row; // slight adaption from another answer here, I had to try out what else you could // abuse as variable names.. turns out, way too much... $string = 'f.&gt; &lt;!-? o+'; ${$string} = 'asdfasf'; echo ${$string}; // -&gt; 'asdfasf' echo $GLOBALS['f.&gt; &lt;!-? o+']; // -&gt; 'asdfasf' // (don't do this. srsly.) ${''} = 456; echo ${''}; // -&gt; 456 echo $GLOBALS['']; // -&gt; 456 // I have no idea. </code></pre> <p>Right, I'll stop for now :-)</p> <hr> <p>Hmm, it's been a while..</p> <pre><code>// just discovered you can comment the hell out of php: $q/* snarf */=/* quux */$_GET/* foo */[/* bar */'q'/* bazz */]/* yadda */; </code></pre> <p>So, just discovered you can pass any string as a method name IF you enclose it with curly brackets. You can't define any string as a method alas, but you can catch them with __call(), and process them further as needed. Hmmm....</p> <pre><code>class foo { function __call($func, $args) { eval ($func); } } $x = new foo; $x-&gt;{'foreach(range(1, 10) as $i) {echo $i."\n";}'}(); </code></pre> <p>Found this little gem in Reddit comments:</p> <pre><code>$foo = 'abcde'; $strlen = 'strlen'; echo "$foo is {$strlen($foo)} characters long."; // "abcde is 5 characters long." </code></pre> <p>You can't call functions inside {} directly like this, but you <em>can</em> use variables-holding-the-function-name and call those! (*and* you can use variable variables on it, too)</p>
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    1. COPlease don't overuse the ternary comparison operator; this leads to code obfuscation.
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    2. CO-1 for un-readability
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    3. COWow. That could totally hose your $GLOBALS list. Bad practice. Seriously.
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