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POHow to reduce for loop speed
 

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    <p>i'm facing a big issue. i need to generate exact 7 number combinations and i written a code for that by using 7 forloops and also it is working fine with very less numbers.Please check the attachment so you will be very clear what i need actually. Please provide PHP result.</p> <pre><code>&lt;?php // I need the combinations for this commented numbers // 1, 7, 13, 19, 25, 31, 2, 8, 14, 20, 26, 32, 3, 9, 15, // 21, 27, 33, 4, 10, 16, 22, 28, 34, 5, 11, 17, 23, 29, // 35, 6, 12, 18, 24, 30, 36 $string=array(1,7,13,19,25,31,2,8,14,20,26,32,3,9,15,21,27,33,4,10,16,22,28,34); $len=count($string); $c=0; ob_start(); for ($e = 0; $e &lt; $len - 6; $e++) { for ($f = $e+1; $f &lt; $len - 5; $f++) { for ($g = $f+1; $g &lt; $len - 4; $g++) { for ($h = $g+1; $h &lt; $len - 3; $h++) { for ($i = $h+1; $i &lt; $len - 2; $i++) { for ($j = $i + 1; $j &lt; $len - 1; $j++) { for ($k = $j + 1; $k &lt; $len; $k++) { $c++; $output[] = $string[$e] . "," . $string[$f] . "," . $string[$g] . "," . $string[$h] . "," . $string[$i] . "," . $string[$j] . "," . $string[$k]; ob_flush(); } ob_flush(); } ob_flush(); } ob_flush(); } ob_flush(); } ob_flush(); } ob_flush(); } echo count($output); ?&gt; </code></pre> <p>And I need the output same like i mentioned below. Output: </p> <pre><code>passed numbers $string=array(1, 7, 13, 19, 25, 31, 2, 8, 14) and the out put is below count of combinations = 36 Array ( [0] =&gt; 1,7,13,19,25,31,2 [1] =&gt; 1,7,13,19,25,31,8 [2] =&gt; 1,7,13,19,25,31,14 [3] =&gt; 1,7,13,19,25,2,8 [4] =&gt; 1,7,13,19,25,2,14 [5] =&gt; 1,7,13,19,25,8,14 [6] =&gt; 1,7,13,19,31,2,8 [7] =&gt; 1,7,13,19,31,2,14 [8] =&gt; 1,7,13,19,31,8,14 [9] =&gt; 1,7,13,19,2,8,14 [10] =&gt; 1,7,13,25,31,2,8 [11] =&gt; 1,7,13,25,31,2,14 [12] =&gt; 1,7,13,25,31,8,14 [13] =&gt; 1,7,13,25,2,8,14 [14] =&gt; 1,7,13,31,2,8,14 [15] =&gt; 1,7,19,25,31,2,8 [16] =&gt; 1,7,19,25,31,2,14 [17] =&gt; 1,7,19,25,31,8,14 [18] =&gt; 1,7,19,25,2,8,14 [19] =&gt; 1,7,19,31,2,8,14 [20] =&gt; 1,7,25,31,2,8,14 [21] =&gt; 1,13,19,25,31,2,8 [22] =&gt; 1,13,19,25,31,2,14 [23] =&gt; 1,13,19,25,31,8,14 [24] =&gt; 1,13,19,25,2,8,14 [25] =&gt; 1,13,19,31,2,8,14 [26] =&gt; 1,13,25,31,2,8,14 [27] =&gt; 1,19,25,31,2,8,14 [28] =&gt; 7,13,19,25,31,2,8 [29] =&gt; 7,13,19,25,31,2,14 [30] =&gt; 7,13,19,25,31,8,14 [31] =&gt; 7,13,19,25,2,8,14 [32] =&gt; 7,13,19,31,2,8,14 [33] =&gt; 7,13,25,31,2,8,14 [34] =&gt; 7,19,25,31,2,8,14 [35] =&gt; 13,19,25,31,2,8,14 ) </code></pre>
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    1. COYou might want to actually explain what the purpose of your code is.
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    2. COYea explain in detail the purpose of your code, im almost positive there will be a better solution to this :/
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    3. COI completely fail to see any possible connections between your topic, the description and your code example...
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