/**
 * 给字符串前后添加指定数量的符号
 *
 * @param 
 * @arrange (512.笔记) jb51.cc
 **/
function str_prefix($str,$n=1,$char=" "){
    for ($x=0;$x<$n;$x++){ $str = $char . $str; } 
    return $str; 
}
 
function str_suffix($str,$char=" "){
    for ($x=0;$x<$n;$x++){ $str = $str . $char; } 
    return $str; 
}
//用法举例：
str_prefix('test',3,'-') => returns '---test'<br/>str_suffix('test','-') => returns 'test---'<br/>


/***   来自编程之家 jb51.cc（jb51.cc）   ***/