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学习动态网页技术PHP中错误处理的一些方法

Jun 13, 2016 am 10:29 AM
php dynamic Basic deal with study open technology method yes Play of Web page mistake

已经玩php一段时间了,基本是from 0开始的,经常出现的问题也很多,慢慢的可以熟练的查询文档了,而且,经验也不是很多。

  先look here。:
  


error_reporting(1048);//1,2,4,7,...,1048
ob_start();
session_start();
date_default_timezone_set(Asia/Shanghai);

  php的递给调用会吃掉很多的内存。
  一般的,不要太多的使用define。
  在类的构造和属性器方面,5已经做了很多的工作,克服的bug就不说了,__系列的函数都有一些看点,也是支持static的。
   
   按照我现在的写过的程序,很少用到框架页面的,我感觉在php里面速度不在是一个问题。
  
  注意类的调用次序,特别是已经extends的,准确的释放掉内存。
  
  
@mysql_fetch_array($result,MYSQL_ASSOC);
这个注意使用乱用,MYSQL_ASSOC,MYSQL_NUM 和 MYSQL_BOTH是一个enum吧。默认的是MYSQL_BOTH.

  mysql的语句,如果执行in 的话不再支持limit。so...很麻烦。

  支持distinct,group之,程序循环执行,md。

  
if(get_magic_quotes_gpc()){
    $_GET=        stripslashes_gpc($_GET);
    $_POST=    stripslashes_gpc($_POST);
    $_COOKIE=    stripslashes_gpc($_COOKIE);
}
    set_magic_quotes_runtime(0);#magic_quotes_runtime
function stripslashes_gpc($array) {
    while (list($key,$value) = each($array)) {
        if (is_string($value)) {
            $array[$key] = addslashes(stripslashes($value));
        } else if (is_array($value))  {
            $array[$key] = stripslashes_gpc($value);
        }
    }
    return $array;
}
/**
 * 处理程序中出现的错误
 * @Date:2006-10-9-10:51
 * @param    (类型)     (参数名)    (描述)
 */
function Error_Handler($errno,$errstr,$errorfile,$errline,$errtext){
    echo(系统发生错误:.$errstr);
    echo(At.$errorfile.的第.$errline.行.);
    if($errno==E_USER_ERROR){
        echo(致命错误,程序已经中止);
    }

}


在使用的时候:
set_error_handler(Error_Handler);
trigger_error(call trigger_error,E_USER_ERROR);


这是使用函数获取的,当然您的错误报告级别应该高点:
error_reporting(1048);


为了更加oo,先看看一个描述类的自写的函数:
$classname=Exception;
/**
 * (功能描述)
 * @Date:
 * @param    (类型)     (参数名)    (描述)
 */
function ClassDetail($classname){
    if(!class_exists($classname)){
        echo($classname.类不存在);
    }else{
        print_r("以下描述类".$classname);
        print_r("所有的方法
");<br>        print_r(get_class_methods($classname));<br>        print_r("
Copy after login
");
        print_r("
所有的属性
");<br>        print_r(get_class_vars($classname));<br>        print_r("
Copy after login

");
    }
}
ClassDetail($classname);


发现exception类的所有get方法是:
    
    [0] => __construct
    [1] => getMessage
    [2] => getCode
    [3] => getFile
    [4] => getLine
    [5] => getTrace
    [6] => getTraceAsString
    [7] => __toString

慢慢的优化个性点,也可以的。



  ok,来看比较oo的处理方式:
class ErrorHandlers extends Exception{
    private $_context = null;
    function  __construct($level,  $string,  $file,  $line,  $context=null){  
        parent::__construct($string,$level);  
        $this->file  =  $file;    
        $this->line  =  $line;  
        $this->_level  =  $level;  
        $this->_context  =  $context;
    }
    function __destruct(){
//        parent::__destruct();
    }
    function Message(){
           $errors = array(
                      E_ERROR          => error,
                      E_WARNING        => warning,
                      E_PARSE          => parsing error,
                      E_NOTICE          => notice,
                      E_CORE_ERROR      => core error,
                      E_CORE_WARNING    => core warning,
                      E_COMPILE_ERROR  => compile error,
                      E_COMPILE_WARNING => compile warning,
                 
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