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Home Backend Development PHP Tutorial 分享一个函数,求bug,求改进^_^

分享一个函数,求bug,求改进^_^

Jun 23, 2016 pm 01:44 PM

我们phper经常会用到很多对数字或字符串的处理函数
遗憾的是大部分都不支持数组
灵光一闪,搞定它
觉得有用的大大们捧个场
顺便找些bug并给些改进的建议

/** * 通过递归调用让函数支持多维数组 by wanderwind * 建议其他函数调用来实现 * @param string $fn 调用函数名称 * @param array $param 参数数组,通常传入func_get_args() * @param int $key 需要递归的参数键值 * @param boolean $check 是否需要检测函数合法性 * @return mixed 返回对$param[$key]的运行结果 */function fn2array($fn, $param, $key = 0, $check = true) {    //从外部调用时默认检测函数合法性,多维数组递归时忽略    if ($check && !function_exists($fn)) {        return false;    }    //提取执行目标,如果目标非数组可以直接执行    $content = $param[$key];    if (!is_array($content)) {        return call_user_func_array($fn, $param);    }    //如果目标是数组则递归执行    foreach ($content as &$val) {        $param[$key] = $val;        $val = fn2array($fn, $param, $key, false);    }    return $content;}function wstripslashes() {    return fn2array('stripslashes', func_get_args());}function wsubstr() {    $param = func_get_args();    $param[3] = isset($param[3]) ? $param[3] : 'utf-8';    return fn2array('mb_substr', $param, 0);}$a = array(    2 => '\"aaaaaaaaaaaaaaa\"',    array('\"啊啊啊啊啊啊啊啊啊啊啊啊啊\"'),    array(array(array('\"sss\dasf\dasfasdsad\"'))),);print_r(wstripslashes($a));print_r(wsubstr($a, 2, 5));
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回复讨论(解决方案)

发完帖子想到一个改进方向,例如我们经常从数据库筛选出一个结果集数组,可能需要单独对某几个字段过滤
例如对title和content单独进行stripslashes
接口可以设计为 wstripslashes($data, 'title,content')
这样的话需要多一步对键值的判定

您忘了 php 的 array_walk_recursive 函数

您忘了 php 的 array_walk_recursive 函数



确实有个不爱看手册的坏毛病
但是刚刚翻了一下,我粗浅的觉得这个函数可能无法满足需求
1,如何支持多维数组?
2,如何用它递归iconv('gbk', 'utf-8', $str)这种函数?
因为没使用过这个函数,可能需要麻烦斑竹写个示例

$ar = array(  array('汉字'),  array('汉字'),  array(    array('汉字'),    array('汉字'),    array(      array('汉字'),      array('汉字'),    ),  ),);function zm(&$v, $k, $charset) {  $v = iconv($charset[0], $charset[1], $v);}array_walk_recursive($ar, 'zm', array('gbk', 'utf-8'));print_r($ar);
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??支持下。

$ar = array(  array('汉字'),  array('汉字'),  array(    array('汉字'),    array('汉字'),    array(      array('汉字'),      array('汉字'),    ),  ),);function zm(&$v, $k, $charset) {  $v = iconv($charset[0], $charset[1], $v);}array_walk_recursive($ar, 'zm', array('gbk', 'utf-8'));print_r($ar);
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感谢xu大,又学到东西了
用系统提供的函数或许性能会强一些
但结合开发体验,我还是想支持自己的方法
array_walk_recursive对原数据是引用,而且参数传递方法比较死,如果想不污染$ar,同时让开发者使用便利,就要再定义一个函数

function zm(&$v, $k, $charset) {    $v = iconv($charset[0], $charset[1], $v);}function wiconv($in, $out, $content) {    array_walk_recursive($content, 'zm', array($in, $out));    return $content;}
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其实这样的wiconv也不行,还要加入$content本身就是字符串的判定条件~
我是希望有一种快速创建新函数,并且不改变原函数使用习惯的方法,貌似有点面向对象的继承思想?
比如我的方法中 iconv可以这样扩展:
function wiconv() {    //2代表递归第三个参数是目标    return fn2array('iconv', func_get_args(), 2);}$ar = array('汉字', array(array('汉字')));print_r(wiconv('utf-8', 'gbk', $ar));    //不改变原函数使用习惯
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您觉得呢

??支持下。



function wiconv($in_charset, $out_charset, $str) {  if(is_array($str)) {    array_walk_recursive($str,      function(&$v, $k, $p) {        $v = iconv($p[0], $p[1], $v);      }, array($in_charset, $out_charset));    return $str;  }  return iconv($in_charset, $out_charset, $str);}
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又想起了那句著名的话:重复造轮子的人呐

不是很明白函数的意思,不过还是进来看看

又想起了那句著名的话:重复造轮子的人呐



前人的轮子不好,咱就努力造个更好的,即便实际做出来很糟糕,这也是造出更好轮子的第一步~你说呢

造轮子没有什么不好,选好材料和工艺才能事半功倍

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