levenshtein

PHP 4 >= 4.0.1, PHP 5, PHP 7, PHP 8

levenshtein - Calculate Levenshtein distance between two strings

Code Examples

Example #1 levenshtein example

Result: Input word: carrrot Did you mean: carrot?

<?php
// input misspelled word
$input = 'carrrot';
// array of words to check against
$words  = array('apple','pineapple','banana','orange',
                'radish','carrot','pea','bean','potato');
// no shortest distance found, yet
$shortest = -1;
// loop through words to find the closest
foreach ($words as $word) {
    // calculate the distance between the input word,
    // and the current word
    $lev = levenshtein($input, $word);
    // check for an exact match
    if ($lev == 0) {
        // closest word is this one (exact match)
        $closest = $word;
        $shortest = 0;
        // break out of the loop; we've found an exact match
        break;
    }
    // if this distance is less than the next found shortest
    // distance, OR if a next shortest word has not yet been found
    if ($lev <= $shortest || $shortest < 0) {
        // set the closest match, and shortest distance
        $closest  = $word;
        $shortest = $lev;
    }
}
echo "Input word: $input\n";
if ($shortest == 0) {
    echo "Exact match found: $closest\n";
} else {
    echo "Did you mean: $closest?\n";
}

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Example #2 of levenshtein

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levenshtein

Example #1 levenshtein example

Example #2 of levenshtein

Function levenshtein:

Strings Functions

Most used PHP functions