javascript - php制作中文验证码的文字数组问题
<code>在做一个php中文验证码时,按原本的思路是将一段文字分割成一个个文字组成个文字数组,然后遍历四次,随机生成四个验证文字,然后画在image上,可是发现用`str_split($str,3)`来分割有时会少一个文字,换成`explode(" ",$str)`还是偶尔缺字。。。 主要代码如下:` $fontFace='aa.ttf'; $str=" 大 闸 是 中 国 主 导 品 牌 亦 行 业 协 会 重 点 推 荐 家 集 养 殖 与 销 售"; $strDb=str_split($str,3); for($i=0;$i</code>
回复内容:
<code>在做一个php中文验证码时,按原本的思路是将一段文字分割成一个个文字组成个文字数组,然后遍历四次,随机生成四个验证文字,然后画在image上,可是发现用`str_split($str,3)`来分割有时会少一个文字,换成`explode(" ",$str)`还是偶尔缺字。。。 主要代码如下:` $fontFace='aa.ttf'; $str=" 大 闸 是 中 国 主 导 品 牌 亦 行 业 协 会 重 点 推 荐 家 集 养 殖 与 销 售"; $strDb=str_split($str,3); for($i=0;$i</code>
两个点,第一个是$str不用空格分开,第二个是生成随机index的时候,应该是-1,不是+1
像这种取数组中某个随机值的时候,index可以用array_rand()
函数来生成
改完如下
<code>$fontFace='aa.ttf'; $str="大闸是中国主导品牌亦行业协会重点推荐家集养殖与销售"; $strDb=str_split($str,3); for($i=0;$i</code>
用mb扩展的函数处理字符串,解决编码问题,另外空格有啥用么?
如果$str含中英文用这个分割$strDb=preg_split('//u', $str, -1, PREG_SPLIT_NO_EMPTY);

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