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PHP determines whether a string is a palindrome string_PHP tutorial
- WBOYOriginal
- 2016-07-13 17:15:34929browse
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 |
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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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