String comparison usage analysis of strnatcmp() function 'Natural Sorting Algorithm' in PHP (compared with strcmp function), strnatcmpstrcmp_PHP tutorial

Strnatcmp() function "Natural Sorting Algorithm" in PHP performs string comparison usage analysis (compare strcmp function), strnatcmpstrcmp

This article describes the strnatcmp() function in PHP" Natural sorting algorithm" for string comparison usage. Share it with everyone for your reference, the details are as follows:

The strnatcmp() function in PHP uses the "natural" algorithm to compare two strings (case-sensitive). Usually in the natural algorithm, the number 2 is less than the number 10. And in computer sorting, 10 is less than 2 because the first number in 10 is less than 2.

The strnatcmp() function is defined as follows:

strnatcmp(string1,string2)

Parameter description:

string1 Required. Specifies the first string to compare.

string2 required. Specifies the second string to be compared.

Return value description:

If the two strings are equal, the return value is 0

If string1 is less than string2, the return value is less than 0

If string1 is greater than string2, the return value is greater than 0

Sample code

is as follows:

The running results are as follows:

<&#63;php
 $str1="2.jpg";
 $str2="10.jpg";
 $str3="jb51.net_1";
 $str4="JB51.NET_2";
 echo strcmp($str1,$str2);//按字节进行比较,返回1
 echo "<br/>";
 echo strcmp($str3,$str4);//按字节进行比较,返1
 echo "<br/>";
 echo strnatcmp($str1,$str2);//按"自然排序"法进行比较,返回-1
 echo "<br/>";
 echo strnatcmp($str3,$str4);//按"自然排序"法进行比较,返回1
&#63;>

For more information about

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PHP string operations , please see the special topic on this site: "Summary of PHP String Usage" I hope this article will be helpful to everyone in PHP programming.

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www.bkjia.comtruehttp: //www.bkjia.com/PHPjc/1089577.htmlTechArticleStrnatcmp() function "Natural Sorting Algorithm" in PHP performs string comparison usage analysis (compare strcmp function), strnatcmpstrcmp This article describes the "natural sorting algorithm" of the strnatcmp() function in PHP...