<?php
function LevenshteinDistance($str1, $str2) {
$d = array ();
$len1 = mb_strlen($str1);
$len2 = mb_strlen($str2);
for ($i1 = 0; $i1 <= $len1; $i1++) {
$d[$i1] = array ();
$d[$i1][0] = $i1;
}
for ($i2 = 0; $i2 <= $len2; $i2++) {
$d[0][$i2] = $i2;
}
for ($i1 = 1; $i1 <= $len1; $i1++) {
for ($i2 = 1; $i2 <= $len2; $i2++) {
$cost = ($str1[$i1 - 1] == $str2[$i2 - 1]) ? 0 : 1;
$d[$i1][$i2] = min(
$d[$i1 - 1][$i2 ] + 1, //挿入
$d[$i1 ][$i2 - 1] + 1, //削除
$d[$i1 - 1][$i2 - 1] + $cost //置換
);
}
}
return $d[$len1][$len2];
}
echo LevenshteinDistance("aaa","aab");
?>
- Output for 4.3.0 - 4.3.11, 4.4.0 - 4.4.9, 5.0.0 - 5.0.5, 5.1.0 - 5.1.6, 5.2.0 - 5.2.17, 5.3.0 - 5.3.29, 5.4.0 - 5.4.45, 5.5.24 - 5.5.35, 5.6.8 - 5.6.28, 7.0.0 - 7.0.20, 7.1.0 - 7.1.20, 7.2.0 - 7.2.33, 7.3.12 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.27, 8.2.0 - 8.2.17, 8.3.0 - 8.3.4
- 1
preferences:
224.61 ms | 405 KiB | 310 Q