Created
January 24, 2013 09:22
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Pascals triangle in PHP.
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| <?php | |
| function pascal_r($n) { | |
| $aLines = [[1]]; | |
| for ($i=1; $i <= $n; $i++) { | |
| $lastItem = $aLines[$i-1]; | |
| $aLines[$i] = []; | |
| for ($j=0; $j <= $i; $j++) { | |
| $aLines[$i][$j] = (isset($lastItem[$j - 1]) ? $lastItem[$j - 1] : 0) + (isset($lastItem[$j]) ? $lastItem[$j] : 0); | |
| } | |
| } | |
| return $aLines[$n - 1]; | |
| } | |
| ?> |
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