PHP method to determine whether a string is a palindrome string_PHP tutorial

PHP method to determine whether a string is a palindrome string

This article mainly introduces the PHP method to determine whether a string is a palindrome string, example analysis Learned the skills of PHP string manipulation to determine palindrome, which has certain reference value. Friends in need can refer to it

The example in this article describes how PHP determines whether a string is a palindrome string. Share it with everyone for your reference. The specific implementation method is as follows:

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function ishuiwen($str){ $len=strlen($str); $l=1; $k=intval($len/2) 1; for($j=0;$j<$k;$j ){ if (substr($str,$j,1)!=substr($str,$len-$j-1,1)) { $l=0; break; } } if ($l==1) { return 1; } else { return -1; } } $str=12321; echo ishuiwen($str); ?>

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<🎜>function ishuiwen($str){<🎜> <🎜>$len=strlen($str);<🎜> <🎜>$l=1;<🎜> <🎜>$k=intval($len/2) 1;<🎜> <🎜>for($j=0;$j<$k;$j ){<🎜> <🎜>if (substr($str,$j,1)!=substr($str,$len-$j-1,1))<🎜> <🎜>{<🎜> <🎜>$l=0;<🎜> <🎜>break;<🎜> <🎜>}<🎜> <🎜>}<🎜> <🎜>if ($l==1)<🎜> <🎜>{<🎜> <🎜>return 1;<🎜> <🎜>}<🎜> <🎜>else<🎜> <🎜>{<🎜> <🎜>return -1;<🎜> <🎜>}<🎜> <🎜>}<🎜> <🎜>$str=12321;<🎜> <🎜>echo ishuiwen($str);<🎜> <🎜>?>

I hope this article will be helpful to everyone’s PHP programming design. http://www.bkjia.com/PHPjc/973130.htmlwww.bkjia.comtruehttp: //www.bkjia.com/PHPjc/973130.htmlTechArticleHow PHP determines whether a string is a palindrome string This article mainly introduces PHP to determine whether a string Whether it is a palindrome string method, an example analysis of php operating string judgment...