PHP: similar_text() function

Last update on October 04 2024 09:43:20 (UTC/GMT +8 hours)

PHP: Calculate the similarity between two strings

The similar_text() function is used to calculate the number of similar characters between two strings.
The similar_text() function can also calculate the similarity of the strings in percent.

Version:

(PHP 4 and above)

Syntax:

similar_text(first_string, second_string, npercent)

Parameter:

Name	Description	Required / Optional	Type
first_string	The first input string.	Required	String
second_string	The second input string.	Required	String
npercent	Variable to store the percentage of similarity between the input strings.	Optional	Integer

Return value:

Returns the number of matching chars in both strings.

Value Type: Integer

Example:

<?php
echo "Comparing strings : 'Good Morning' and 'Good Evening'".'<br>';
echo 'No of similar characters : '.similar_text('Good Morning', 'Good Evening').'<br>';
similar_text('Good Morning', 'Good Evening', $similar_percent);
echo 'Similarity between two strings in  percentage : '. $similar_percent;
?>

Output:

Comparing strings: 'Good Morning' and 'Good Evening'
No of similar   characters : 9
Similarity between two strings in  percentage : 75

View the example in the browser

See also

PHP Function Reference

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