search
HomeBackend DevelopmentPHP ProblemWhat should I do if php does not display error messages?

Solution to php not displaying error messages: First open the "etc/php.ini" file in the php directory; then add the content as "error_reporting(E_ALL);ini_set('display_errors','On') ;";Finally save the file.

What should I do if php does not display error messages?

Recommended: "PHP Video Tutorial"

On some servers, when the PHP code execution error occurs, browse The programmer will only display 500 errors, which is not conducive for programmers to locate error codes.

There are 2 settings for turning on PHP error message display:

1: error_reporting = error reporting level (if it is development mode, please set it to: E_ALL)

2: display_errors = On

These two settings are indispensable. When display_errors=Off, no error information will be displayed no matter what level error_reporting is set to.

Setting method:

1: Modify the etc/php.ini file in the php directory

2: Add to the php code:

error_reporting(E_ALL);
ini_set(‘display_errors’,’On’);

Attached error_reporting error level code:

值 常量 描述
1 E_ERROR 致命的运行错误。错误无法恢复,暂停执行脚本。
2 E_WARNING 运行时警告(非致命性错误)。非致命的运行错误,脚本执行不会停止。
4 E_PARSE 编译时解析错误。解析错误只由分析器产生。
8 E_NOTICE 运行时提醒(这些经常是你代码中的bug引起的,也可能是有意的行为造成的。)
16 E_CORE_ERROR PHP启动时初始化过程中的致命错误。
32 E_CORE_WARNING PHP启动时初始化过程中的警告(非致命性错)。
64 E_COMPILE_ERROR 编译时致命性错。这就像由Zend脚本引擎生成了一个E_ERROR。
128 E_COMPILE_WARNING 编译时警告(非致命性错)。这就像由Zend脚本引擎生成了一个E_WARNING警告。
256 E_USER_ERROR 用户自定义的错误消息。这就像由使用PHP函数trigger_error(程序员设置E_ERROR)
512 E_USER_WARNING 用户自定义的警告消息。这就像由使用PHP函数trigger_error(程序员设定的一个E_WARNING警告)
1024 E_USER_NOTICE 用户自定义的提醒消息。这就像一个由使用PHP函数trigger_error(程序员一个E_NOTICE集)
2048 E_STRICT 编码标准化警告。允许PHP建议如何修改代码以确保最佳的互操作性向前兼容性。
4096 E_RECOVERABLE_ERROR 开捕致命错误。这就像一个E_ERROR,但可以通过用户定义的处理捕获(又见set_error_handler())
8191 E_ALL 所有的错误和警告(不包括 E_STRICT) (E_STRICT will be part of E_ALL as of PHP 6.0)

The above is the detailed content of What should I do if php does not display error messages?. For more information, please follow other related articles on the PHP Chinese website!

Statement
The content of this article is voluntarily contributed by netizens, and the copyright belongs to the original author. This site does not assume corresponding legal responsibility. If you find any content suspected of plagiarism or infringement, please contact admin@php.cn
php怎么把负数转为正整数php怎么把负数转为正整数Apr 19, 2022 pm 08:59 PM

php把负数转为正整数的方法:1、使用abs()函数将负数转为正数,使用intval()函数对正数取整,转为正整数,语法“intval(abs($number))”;2、利用“~”位运算符将负数取反加一,语法“~$number + 1”。

php怎么实现几秒后执行一个函数php怎么实现几秒后执行一个函数Apr 24, 2022 pm 01:12 PM

实现方法:1、使用“sleep(延迟秒数)”语句,可延迟执行函数若干秒;2、使用“time_nanosleep(延迟秒数,延迟纳秒数)”语句,可延迟执行函数若干秒和纳秒;3、使用“time_sleep_until(time()+7)”语句。

php怎么除以100保留两位小数php怎么除以100保留两位小数Apr 22, 2022 pm 06:23 PM

php除以100保留两位小数的方法:1、利用“/”运算符进行除法运算,语法“数值 / 100”;2、使用“number_format(除法结果, 2)”或“sprintf("%.2f",除法结果)”语句进行四舍五入的处理值,并保留两位小数。

php怎么根据年月日判断是一年的第几天php怎么根据年月日判断是一年的第几天Apr 22, 2022 pm 05:02 PM

判断方法:1、使用“strtotime("年-月-日")”语句将给定的年月日转换为时间戳格式;2、用“date("z",时间戳)+1”语句计算指定时间戳是一年的第几天。date()返回的天数是从0开始计算的,因此真实天数需要在此基础上加1。

php怎么判断有没有小数点php怎么判断有没有小数点Apr 20, 2022 pm 08:12 PM

php判断有没有小数点的方法:1、使用“strpos(数字字符串,'.')”语法,如果返回小数点在字符串中第一次出现的位置,则有小数点;2、使用“strrpos(数字字符串,'.')”语句,如果返回小数点在字符串中最后一次出现的位置,则有。

php字符串有没有下标php字符串有没有下标Apr 24, 2022 am 11:49 AM

php字符串有下标。在PHP中,下标不仅可以应用于数组和对象,还可应用于字符串,利用字符串的下标和中括号“[]”可以访问指定索引位置的字符,并对该字符进行读写,语法“字符串名[下标值]”;字符串的下标值(索引值)只能是整数类型,起始值为0。

php怎么设置implode没有分隔符php怎么设置implode没有分隔符Apr 18, 2022 pm 05:39 PM

在PHP中,可以利用implode()函数的第一个参数来设置没有分隔符,该函数的第一个参数用于规定数组元素之间放置的内容,默认是空字符串,也可将第一个参数设置为空,语法为“implode(数组)”或者“implode("",数组)”。

php怎么读取字符串后几个字符php怎么读取字符串后几个字符Apr 22, 2022 pm 08:31 PM

在php中,可以使用substr()函数来读取字符串后几个字符,只需要将该函数的第二个参数设置为负值,第三个参数省略即可;语法为“substr(字符串,-n)”,表示读取从字符串结尾处向前数第n个字符开始,直到字符串结尾的全部字符。

See all articles

Hot AI Tools

Undresser.AI Undress

Undresser.AI Undress

AI-powered app for creating realistic nude photos

AI Clothes Remover

AI Clothes Remover

Online AI tool for removing clothes from photos.

Undress AI Tool

Undress AI Tool

Undress images for free

Clothoff.io

Clothoff.io

AI clothes remover

AI Hentai Generator

AI Hentai Generator

Generate AI Hentai for free.

Hot Article

R.E.P.O. Energy Crystals Explained and What They Do (Yellow Crystal)
2 weeks agoBy尊渡假赌尊渡假赌尊渡假赌
Repo: How To Revive Teammates
4 weeks agoBy尊渡假赌尊渡假赌尊渡假赌
Hello Kitty Island Adventure: How To Get Giant Seeds
4 weeks agoBy尊渡假赌尊渡假赌尊渡假赌

Hot Tools

Dreamweaver CS6

Dreamweaver CS6

Visual web development tools

SecLists

SecLists

SecLists is the ultimate security tester's companion. It is a collection of various types of lists that are frequently used during security assessments, all in one place. SecLists helps make security testing more efficient and productive by conveniently providing all the lists a security tester might need. List types include usernames, passwords, URLs, fuzzing payloads, sensitive data patterns, web shells, and more. The tester can simply pull this repository onto a new test machine and he will have access to every type of list he needs.

MantisBT

MantisBT

Mantis is an easy-to-deploy web-based defect tracking tool designed to aid in product defect tracking. It requires PHP, MySQL and a web server. Check out our demo and hosting services.

mPDF

mPDF

mPDF is a PHP library that can generate PDF files from UTF-8 encoded HTML. The original author, Ian Back, wrote mPDF to output PDF files "on the fly" from his website and handle different languages. It is slower than original scripts like HTML2FPDF and produces larger files when using Unicode fonts, but supports CSS styles etc. and has a lot of enhancements. Supports almost all languages, including RTL (Arabic and Hebrew) and CJK (Chinese, Japanese and Korean). Supports nested block-level elements (such as P, DIV),

ZendStudio 13.5.1 Mac

ZendStudio 13.5.1 Mac

Powerful PHP integrated development environment