What's going on when php can't be loaded?

In the daily use of computers, we sometimes encounter some problems, such as error messages such as "Cannot load PHP" that suddenly appear when browsing the web. So how did this problem arise? If we encounter this problem, how should we solve it? This article will introduce the reasons why PHP cannot be loaded and how to solve it.

1. Cause

The inability to load PHP is an error caused by the PHP file on the server not being parsed correctly. Normally, we write PHP programs on the local computer and upload them to the server to run. Therefore, the reason why PHP cannot be loaded is mostly related to the server environment.

Common reasons why PHP cannot be loaded include:

(1) PHP is not installed on the server or the PHP version is too low;

(2) The permissions of the PHP file are incorrect;

(3) The directory where the PHP file is located does not have execution permission;

(4) The syntax of the code in the PHP file is incorrect.

2. Solution

(1) Check whether PHP is installed on the server or whether the PHP version is too low

If the server does not have PHP installed or the PHP version is too low If it is low, then the PHP file will not be parsed correctly, so we need to first check whether the server has PHP installed or whether the PHP version is too low. You can check it with the following command:

php -v

If the PHP version information is not output, it means that PHP is not installed on the server and you need to install PHP first.

(2) Check whether the permissions of the PHP file are correct

Correct permissions can ensure that the PHP file can be correctly accessed by the server. It is generally recommended that the permissions of PHP files be set to 644 (-rw-r--r--), that is, only the file owner has write permissions, and others only have read permissions.

You can view and modify the permissions of the PHP file through the following command:

ls -l filename.php
chmod 644 filename.php

(3) Check whether the directory where the PHP file is located has execution permission

If the directory where the PHP file is located Without execution permissions, the server cannot parse the PHP file correctly. Therefore, we need to ensure that the directory where the PHP file is located has execution permissions. It is generally recommended that the permissions of this directory be set to 755 (drwxr-xr-x), which means that everyone can read, write and execute.

You can view and modify the permissions of the directory through the following command:

ls -ld dirname
chmod 755 dirname

(4) Check whether the syntax in the PHP file is correct

Syntax errors in the PHP file may cause PHP file cannot be parsed correctly. We can check whether the syntax in the PHP file is correct through the editor's syntax check function or using the PHP command line:

php -l filename.php

If there is a syntax error in the PHP file, an error message will be output. We can based on the error information to fix syntax errors in PHP files.

Summary:

Unable to load PHP is a common server error, and the reasons are mostly related to the server environment. When we encounter this problem, we can troubleshoot the problem one by one according to the above method and make corrections in time. I hope this article will help you solve the problem of unable to load PHP.

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