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Home Backend Development PHP Tutorial 【高手请近】PHP 【global引用传递】 和 【static 静态变量】 不起作用

【高手请近】PHP 【global引用传递】 和 【static 静态变量】 不起作用

Jun 23, 2016 pm 02:06 PM

两个单独的PHP文件: PhpGlobal.php 和  PhpStatic.php

PhpGlobal.php全部内容:

<?php/*$FileName : PhpGlobal.php$Output:>>>Parse error: syntax error, unexpected '&', expecting T_VARIABLE or '$' in D:\WebSite\MyHost\www.35dalu.com\public_html\test\PhpGlobal.PHP on line 10*/function censorCount(&$string){  global &$censorCount;  $censorCount = (object)array('banned' => 0,'mod'=> 0,'filter' => 0);  if(preg_match("/日本/i",$string))  {    $censorCount->banned++;  }  if(preg_match("/韩国/i",$string))  {    $censorCount->mod++;  }  if(preg_match("/尼玛/i",$string))  {    $censorCount->filter++;    $string = str_replace("尼玛","nima",$string);  }  return $string;}$arr = array('title'     => "尼玛韩国比日本牛鼻吗?",'content'   => "韩国比日本牛鼻吗?WHOSAIDSO?WHO !WHO!",'author'    => "韩国比",);$censorCount = '';foreach( $arr as $k => $v){  $arr[$k] = censorCount( $v );}print_r( $arr );echo '<hr />';print_r( $censorCount );
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PhpStatic.php全部内容:
<?php/*$FileName : PhpStatic.php$output>>>Array(    [title] => **nima**韩国比日本牛鼻吗?    [content] => 韩国比日本牛鼻吗?WHOSAIDSO?WHO !WHO!    [author] => 韩国比)<hr /><b>0</b>*/function censorCount(&$string){  static $censorCount;  static $cc = 0;  $censorCount = (object)array('banned' => 0,'mod'=> 0,'filter' => 0);  if(preg_match("/日本/i",$string))  {    $cc++;    $censorCount->banned++;  }  if(preg_match("/韩国/i",$string))  {    $cc++;    $censorCount->mod++;  }  if(preg_match("/尼玛/i",$string))  {    $cc++;    $censorCount->filter++;    $string = str_replace("尼玛","**nima**",$string);  }  return $string;}$cc=0;$arr = array('title'     => "尼玛韩国比日本牛鼻吗?",'content'   => "韩国比日本牛鼻吗?WHOSAIDSO?WHO !WHO!",'author'    => "韩国比",);$censorCount = '';foreach( $arr as $k => $v){  $arr[$k] = censorCount( $v );}print_r( $arr );echo '<hr />';echo "<b>$cc</b>";print_r( $censorCount );
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我现在要的内容是:每次检测都会让检测的结果累加。
在弄一个字符串过滤的函数但是里面的检测结果不能统计,就是程序全部检测完之后统计一遍 所有总的 mod数目 banned数目 filter数目。但是 static 静态变量global 引入传递都不起作用!


回复讨论(解决方案)

没仔细看代码,不过你可以考虑写到一个文件里面,或者用数据库存储

$censorCount = (object)array('banned' => 0,'mod'=> 0,'filter' => 0);


赋值,,,会抹去之前所有的改动

你这代码即使实现看起来也够难看,用类方式重写吧。

function censorCount(&$string=''){  static $censorCount;  static $cc = 0;  if(empty($string)) return $censorCount;//注意这里  if(empty($censorCount)) $censorCount = (object)array('banned' => 0,'mod'=> 0,'filter' => 0);//注意这里  if(preg_match("/日本/i",$string))  {    $cc++;    $censorCount->banned++;  }  if(preg_match("/韩国/i",$string))  {    $cc++;    $censorCount->mod++;  }  if(preg_match("/尼玛/i",$string))  {    $cc++;    $censorCount->filter++;    $string = str_replace("尼玛","**nima**",$string);  }  return $string;}$cc=0;$arr = array('title'     => "尼玛韩国比日本牛鼻吗?",'content'   => "韩国比日本牛鼻吗?WHOSAIDSO?WHO !WHO!",'author'    => "韩国比",);$censorCount = '';foreach( $arr as $k => $v){  $arr[$k] = censorCount( $v );}print_r( $arr );echo '<hr />';echo "<b>$cc</b>";print_r( censorCount() );//注意这里
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另一版本与此类似

PHP code
function censorCount(&$string='')
{
  static $censorCount;
  static $cc = 0;
  if(empty($string)) return $censorCount;//注意这里
  if(empty($censorCount)) $censorCount = (object)array('bann……

谢谢啊。
不过那个 $cc的变量的值没有变啊。
另外我有一个疑问的地方。
(1)如果在函数里面使用static,那么那个变量不需要提前声明吗?
(2)我发现有的时候  $obj=(object)array(); 会报错,必须写非空的array()才不会。但是有的时候我又发现直接写一句  $obj=(object)array(); 不会报错,但是有的时候又会报错。
(3)关于函数内引用传递的 在函数内使用 global &$var; 立即报错。那个  & 和  $var 之间是否要空格?还是 & 和$var连接在一起。
(4)函数引用传递的问题。只知道变量引用传递是在函数内变动,那么函数外的也变了。那函数引用传递是什么作用?一直难以理解…………

$obj=(object)array(); 有时候会报错?我见暂时毛见过,当然我也用得不多
&$var 不需要空格
函数引用返回多见于对象吧,比如引用一个对象变量很多,你希望用完后人肉清理,可以用&.再$test=null

老兄也有这个问题啊! 仔细看手册,一句一句地看及例子了。

你的代码太长了。


(1)如果在函数里面使用static,那么那个变量不需要提前声明吗?

static就是声明,也可赋值。只起作用一次。

(2)我发现有的时候 $obj=(object)array(); 会报错,必须写非空的array()才不会。但是有的时候我又发现直接写一句 $obj=(object)array(); 不会报错,但是有的时候又会报错。

如果$obj已是引用,或能会报错。正常情况,不报错。 这一点自已测试看看吧! 看手册的例子了。

(3)关于函数内引用传递的 在函数内使用global &$var; 立即报错。那个 & 和 $var 之间是否要空格?还是 & 和$var连接在一起。

global本身就是引用,不需要& .

(4)函数引用传递的问题。只知道变量引用传递是在函数内变动,那么函数外的也变了。那函数引用传递是什么作用?一直难以理解…………

如果变量没有声明,自动创建。 作用很简单啊,正常情况下,变量在函数内是局变的。 引用可以直接操作全局的变量。

以前特点是对象引用很有意义。 但php5之 ,所有对象都是本身就是引用方式传参的。用不用都行了。 只有变量引用才有意义。

这在设计模式时很有意义,你可以方便地将对象传给任何其他对象。 引用来引用去!

先结贴了。对于 function 的引用传递不是很理解。~

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