php为字符串前后添加指定数量字符的方法,php字符串
本文实例讲述了php为字符串前后添加指定数量字符的方法。分享给大家供大家参考。具体分析如下:
这段php代码定义了两个函数 str_prefix和str_suffix,分别用来给字符串前后添加指定数量的符号
function str_prefix($str, $n=1, $char=" "){ for ($x=0;$x<$n;$x++){$str = $char.$str;} return $str; } function str_suffix($str, $n=1, $char=" "){ for ($x=0;$x<$n;$x++){$str = $str.$char;} return $str; }
用法举例:
str_prefix('test',3,'-')=>returns'---test' str_suffix('test',3,'-')=> returns 'test---'
希望本文所述对大家的php程序设计有所帮助。
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