Recursive Functions are functions that auto-call themself. Generally, a recursive function returns a value that are passed as argument, so the value is passed from an auto-call to the other, until it is returned.
Recursive functions are very useful in equations with factorial numbers and some operatios with multi-dimensional array.
Factorials are written like 6! and this means: 6 * 5 * 4 * 3 * 2 * 1. So 6! is 4320 and 4! is 24.
In the fallowing example we have a recursive function that finds the factorial of a number "$nr" (here 8).
<?php // this function auto-calls itself (decrementing $nr) until $nr is 0 function factorial($nr) { if($nr > 0) $re = $nr * factorial($nr-1); else if($nr == 0) $re = 1; return $re; } echo '8 factorial is: '. factorial(8); // 8 factorial is: 45360 ?>
<ul> <li>http://coursesweb.net/html/</li> <li>http://coursesweb.net/css/</li> </ul>
.some_class { display: list-item; }
var obj = { "courses": ["php", "javascript", "ajax"] }; var jsonstr = JSON.stringify(obj); alert(jsonstr); // {"courses":["php","javascript","ajax"]}
$strhtml = '<body><div id="dv1">CoursesWeb.net</div></body>'; $dochtml = new DOMDocument(); $dochtml->loadHTML($strhtml); $elm = $dochtml->getElementById("dv1"); echo $elm->nodeValue; // CoursesWeb.net