Calculate two string similarity using PHP similar text, similartext_php tutorial

Calculates two string similarity using PHP similar text, Similartext

In web development, we often use PHP similar text to calculate two string similarity;

The use of 1,similar_text

If I want to calculate the similarity between "LY89CN" and "ly89", there are two ways to express it.

Copy the Code code as follows:
echo similar_text (' ly89cn ', ' ly89 ');

So output 4 because they have 4 characters equal

Copy the Code code as follows:
Similar_text (' ly89cn ', ' ly89 ', $percent);
Echo $percent;

So the output of the $percent represents a percentage, indicating that they have a similar degree of 80%

Of course, you can compare two Chinese characters, such as "Wang Yip Building's personal blog" and "Wang Yip Building"

Copy the Code code as follows:
Echo Similar_text (' Wang Yip Building's personal blog ', ' Wang Yip Building ');

So output 9, which means that their 9 bytes are equal

Copy the Code code as follows:
Similar_text (' Wang Yip Lou's personal blog ', ' Wang Yip Building ', $percent);
Echo $percent;

Output 54.545454545455, note Chinese characters may not be accurate!

PHP Similar_text () function

Instance

Calculates the similarity of two strings and returns the number of matching characters:

Copy the Code code as follows:
<?php
echo similar_text ("Hello World", "Hello Shanghai");
?>

Running an instance

Definition and usage

The Similar_text () function calculates the similarity of two strings.

The function can also calculate the percent similarity of two strings.

Note: the Levenshtein () function is faster than the Similar_text () function. However, the Similar_text () function provides more precise results with fewer required modifications.

Grammar

Copy the Code code as follows:
Similar_text (string1,string2,percent)

parameter	description
String1	Necessary. Specifies the first string to compare.
string2	Necessary. Specifies a second string to compare.
Percent	Optional. A variable name that specifies the similarity of the storage percentage.

Technical details

return value:	Returns the number of matching characters for two strings.
PHP version:	4 +

More examples

Example 1

Calculates the percent similarity between two strings:

Copy the Code code as follows:
<?php
Similar_text ("Hello World", "Hello Shanghai", $percent);
Echo $percent. "%";
?>

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