PHP determines whether a string is a palindrome string_PHP tutorial

This article will introduce you to an example to determine whether a string is a palindrome string. Friends who need to know more can refer to it.

代码如下	复制代码
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); ?>

http://www.bkjia.com/PHPjc/628807.htmlwww.bkjia.comtruehttp: //www.bkjia.com/PHPjc/628807.htmlTechArticleThis article will introduce you to an example to determine whether a string is a palindrome string. If you need to know more Friends can refer to it. The code is as follows Copy the code ?php function ishuiwen...