Online PHP editor | perf for 7YW0R

@ 2022-11-12T17:04:47Z

<?php

function str_intersection($str1, $str2)
{
   [$long, $short] = strlen($str1) > strlen($str2) ? [$str1, $str2] : [$str2, $str1];
   $shortLength = strlen($short);
   for ($length = $shortLength; $length > 0; $length--) {
       for ($offset = 0; $offset < $shortLength - 1; $offset++) {
           if (strpos($long, substr($short, $offset, $length)) !== false) return $length;
       }       
   }
   return 0;    
}

$str1 = "lorem ipsum";
$str2 = "rem";
echo str_intersection($str1, $str2) . PHP_EOL; // Expected result: 3

$str2 = "xzy";
echo str_intersection($str1, $str2) . PHP_EOL; // Expected result: 0

Here you find the average performance (time & memory) of each version. A grayed out version indicates it didn't complete successfully (based on exit-code).

Version	System time (s)	User time (s)	Memory (MiB)
8.3.7	0.014	0.000	16.58
8.3.6	0.014	0.007	16.48
8.3.5	0.018	0.000	18.18
8.3.4	0.013	0.007	19.92
8.3.3	0.010	0.010	18.39
8.3.2	0.000	0.008	24.18
8.3.1	0.008	0.000	24.66
8.3.0	0.004	0.004	26.16
8.2.19	0.008	0.008	16.88
8.2.18	0.011	0.004	25.92
8.2.17	0.004	0.011	22.96
8.2.16	0.008	0.008	22.96
8.2.15	0.007	0.000	25.66
8.2.14	0.006	0.003	24.66
8.2.13	0.005	0.002	26.16
8.2.12	0.004	0.004	19.44
8.2.11	0.004	0.008	20.50
8.2.10	0.006	0.006	20.34
8.1.28	0.010	0.007	25.92
8.1.27	0.005	0.003	18.70
8.1.26	0.000	0.008	26.35
8.1.25	0.004	0.004	28.09
8.1.24	0.004	0.004	18.62
8.1.23	0.006	0.003	18.70
8.0.25	0.007	0.003	19.07

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