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run code in 300+ PHP versions simultaneously
<?php function similarity($str1, $str2) { $len1 = strlen($str1); $len2 = strlen($str2); $max = max($len1, $len2); $similarity = $i = $j = 0; while (($i < $len1) && isset($str2[$j])) { if ($str1[$i] == $str2[$j]) { $similarity++; $i++; $j++; } elseif ($len1 < $len2) { $len1++; $j++; } elseif ($len1 > $len2) { $i++; $len1--; } else { $i++; $j++; } } return round($similarity / $max, 2); } $str1 = '12345678901234567890'; $str2 = '12345678991234567890'; echo 'Similarity: ' . (similarity($str1, $str2) * 100) . '%'; ?>
Output for 5.6.38, 7.0.33, 7.1.25, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.4, 8.3.6
Similarity: 95%
Output for 8.3.5
Warning: PHP Startup: Unable to load dynamic library 'sodium.so' (tried: /usr/lib/php/8.3.5/modules/sodium.so (libsodium.so.23: cannot open shared object file: No such file or directory), /usr/lib/php/8.3.5/modules/sodium.so.so (/usr/lib/php/8.3.5/modules/sodium.so.so: cannot open shared object file: No such file or directory)) in Unknown on line 0 Similarity: 95%

preferences:
157.04 ms | 402 KiB | 154 Q