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Home Backend Development PHP Tutorial php程序怎调试?

php程序怎调试?

Jun 23, 2016 pm 02:18 PM

gedit+Mozilla Firefox

<?php$x="1.23abc";echo $x+7;           //程序以上部分是对。//程序以下部分是错。//在浏览器运行这个程序,结果是:什么也不显示!$y=a1.0;if ($y)echo "QQ"; ?>
Copy after login


用上面的记事本+浏览器 调试。
如果php程序的一部分出错,可能整个程序的结果,都不能在浏览器里显示出来。
这样,查找程序错误有些困难。
有什么方法,解决这个问题呢?


回复讨论(解决方案)

开启php错误提示功能
php.ini 中设置display_errors=On ,然后重启服务器。

没有打开错误显示功能时,任何php错误都将导致一个 500 错误(服务器拒绝响应)

$y=a1.0;
语法错! Parse error: syntax error, unexpected '.0' (T_DNUMBER)

开启php错误提示功能
php.ini 中设置display_errors=On ,然后重启服务器。

1.在哪个目录?
2.怎样重启服务器?

在你的php文件中写上:
phpinfo();

查找Loaded Configuration File ,修改它加载的php.ini 文件即可。

重启服务可以打开你的系统服务列表,找到apache,然后重启,或者命令行下也行。

在你的php文件中写上:
phpinfo();

查找Loaded Configuration File ,修改它加载的php.ini 文件即可。

重启服务可以打开你的系统服务列表,找到apache,然后重启,或者命令行下也行。

1.php.ini 在哪个目录?
2.重启命令怎样?

在你的程序?部加入??行就可以了,不用修改php.ini

Error_reporting(E_ALL);
INI_Set('display_errors','on');


在你的php文件中写上:
phpinfo();

查找Loaded Configuration File ,修改它加载的php.ini 文件即可。

重启服务可以打开你的系统服务列表,找到apache,然后重启,或者命令行下也行。

1.php.ini 在哪个目录?
2.重启命令怎样?

你不是windows下的么
php.ini一般在php文件夹根目录下
重启直接在"系统服务"列表中 找到apache 然后重启 sibang说的很清楚你直接去做就可以了

打开系统服务列表的办法是 在"计算机"或者"我的电脑"上点右键,选择"管理"->服务

亲,windows下找不到目录不会用查找文件来找吗?



在你的php文件中写上:
phpinfo();

查找Loaded Configuration File ,修改它加载的php.ini 文件即可。

重启服务可以打开你的系统服务列表,找到apache,然后重启,或者命令行下也行。

1.php.ini 在哪个目录?
2.重启命令怎样?

你不是windows下的么
php.ini一般在php文件夹根目录下
重启直接在"系统服务"列表中 找到apache 然后重启 sibang说的很清楚你直接去做就可以了

打开系统服务列表的办法是 在"计算机"或者"我的电脑"上点右键,选择"管理"->服务

ubuntu

楼主抱歉..我看错帖子了 你这个不是windows下的..... 汗一个... 刚才一个帖子里看到了D:/xxxxx

楼主抱歉..我看错帖子了 你这个不是windows下的..... 汗一个... 刚才一个帖子里看到了D:/xxxxx

/

楼主抱歉..我看错帖子了 你这个不是windows下的..... 汗一个... 刚才一个帖子里看到了D:/xxxxx


楼主抱歉..我看错帖子了 你这个不是windows下的..... 汗一个... 刚才一个帖子里看到了D:/xxxxx

注意代码第七行,这是个字符串赋值还是?否则如#2所说,未知错误(不存在这样的定义)。如果是字符串赋值,则写成这样:$y= 'a1.0 ';

开启php错误提示功能
php.ini 中设置display_errors=On ,然后重启服务器。

ubuntu系统
1.php.ini 文件在哪个目录?

2.重启服务器命令是什么?

不知道你的php是自带的还是后来编译的,网上搜索一下吧,我很少玩linux,不是很熟悉。

新建以文件,比如 info.php

<?phpphpinfo();
Copy after login
Copy after login
Copy after login
Copy after login
Copy after login

运行后查看这两项
Configuration File (php.ini) Path (默认的 php.ini 路径)
Loaded Configuration File (实际加载的 php.ini 路径)

新建以文件,比如 info.php

<?phpphpinfo();
Copy after login
Copy after login
Copy after login
Copy after login
Copy after login

运行后查看这两项
Configuration File (php.ini) Path (默认的 php.ini 路径)
Loaded Configuration File (实际加载的 php.ini 路径)
老大,我那问题是不是缺什么东西?没法继续了?

我在 #2 不是说了吗?
那是语法错!如果不打开错误显示,则会出现 500 错
如果你设置了错误日志,那么也不会显示。但你可以在错误日志里看到错误信息
总之,当出现语法错误的时候,php 就退出运行了



新建以文件,比如 info.php

<?phpphpinfo();
Copy after login
Copy after login
Copy after login
Copy after login
Copy after login

运行后查看这两项
Configuration File (php.ini) Path (默认的 php.ini 路径)
Loaded Configuration File (实际加载的 php.ini 路径)
老大,我那问题是不是缺什么东西?没法继续了?

我在 #2 不是说了吗?
那是语法错!如果不打开错误显示,则会出现 500 错
如果你设置了错误日志,那么也不会显示。但你可以在错误日志里看到错误信息
总之,当出现语法错误的时候,php 就退出运行了




新建以文件,比如 info.php

<?phpphpinfo();
Copy after login
Copy after login
Copy after login
Copy after login
Copy after login

运行后查看这两项
Configuration File (php.ini) Path (默认的 php.ini 路径)
Loaded Configuration File (实际加载的 php.ini 路径)
老大,我那问题是不是缺什么东西?没法继续了?
不是这个帖子。。。
请移步:http://bbs.csdn.net/topics/390507272



在你的php文件中写上:
phpinfo();

查找Loaded Configuration File ,修改它加载的php.ini 文件即可。

重启服务可以打开你的系统服务列表,找到apache,然后重启,或者命令行下也行。

1.php.ini 在哪个目录?
2.重启命令怎样?

你不是windows下的么
php.ini一般在php文件夹根目录下
重启直接在"系统服务"列表中 找到apache 然后重启 sibang说的很清楚你直接去做就可以了

打开系统服务列表的办法是 在"计算机"或者"我的电脑"上点右键,选择"管理"->服务


,,,

在你的程序?部加入??行就可以了,不用修改php.ini

Error_reporting(E_ALL);
INI_Set('display_errors','on');

这个方法也不行。
mozilla firefox浏览器,什么也没显示。

新建以文件,比如 info.php

<?phpphpinfo();
Copy after login
Copy after login
Copy after login
Copy after login
Copy after login

运行后查看这两项
Configuration File (php.ini) Path  (默认的 php.ini 路径)
Loaded Configuration File  (实际加载的 php.ini 路径)

1.创建一新文件:info.php,这个文件存放在什么地方?
2.还要修改文件:php.ini么?

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