The PHP function similar_text() is a simple algorithm for calculating the similarity between two strings. A string represents a sequence of characters, letters or words that are grouped together as a string of variable length. In practice, PHP similar-text() fulfills many different purposes for websites and can increase their functionality.
The algorithm is based on an Oliver described method (a 1993 developed File Transfer Protocol front-end), but slightly modified.
The Ryte software does not use the similar_text() function for calculating text uniqueness and identifying duplicate content. It uses the Shingle algorithm which is also applied by Google.
The result of the comparison of two strings is always a percentage. A similar function is called Levenshtein distance, with which is calculated how a string has to be changed so that it is similar to another.
The function syntax is as follows:
<?php echo similar_text("Hallo Captain","Hello Serpino"); ?>
The PHP function “similar_text” can handle different functions on websites:
If longer strings are checked, the PHP function similar_text () can be very slow, which may adversely affect the performance of a website. Therefore, this feature should be used only for short strings.