php modify configuration file

How to modify the configuration file of php: first find and open the php.ini configuration file; then find the "max_execution_time" item in the file; finally modify the parameters and save it.

The operating environment of this tutorial: MacOS X system, php5.6. This article is applicable to all brands of computers.

Recommended: "PHP Video Tutorial"

1. Mac Auto Configuring php.ini in a PHP environment

There is no default php.ini file in Mac OS X, but there is a corresponding template file php.ini.default, located at /private/etc/php.ini.default or Say /etc/php.ini/default, you can make a copy and modify it yourself.
Copy command:

sudo cp /private/etc/php.ini.default /private/etc/php.ini

After successful copying

cd /private/etc/sudo vi php.ini

2. Modify the php.ini configuration file in XAMPP For Mac

Modify the php.ini configuration file during installation Directory/Applications/XAMPP/xamppfiles/etc/php.ini

file_uploads=on/off	Whether it is allowed to upload files via http
max_execution_time=30	The maximum execution time allowed for the script, if it exceeds this time, an error will be reported
memory_limit=50M	Set the maximum amount of memory that a script can allocate to prevent runaway scripts from occupying too much memory. This instruction only takes effect when the –enable-memory-limit flag is set during compilation.
upload_max_filesize=20M	The maximum size of files allowed to be uploaded, this command must be smaller than post_max_size
upload_tmp_dir	The temporary storage directory for uploaded files
post_max_size=30M	Allow the post method to accept the maximum size

$_FILES array content is as follows:

$_FILES['myFile']['name']	The original name of the client's last file
$_FILES['myFile']['type']	The MIME type of the file, the browser needs to provide support for this information, such as "image/gif"
$_FILES['myFile']['size']	The size of the uploaded file in bytes
$_FILES['myFile'] ['tmp_name']	The temporary file name stored on the server after the file is uploaded, usually the system default. It can be specified in upload_tmp_dir of php.ini, but setting it with the putenv() function will not work
$_FILES['myFile']['error']	Status code related to the file upload

$_FILES['myFile']['error']Status code related to the file upload . [‘error’] was added in PHP version 4.2.0. The following is its description: (They became constants after PHP3.0)

UPLOAD_ERR_OK Value: 0	No error occurred, the file was uploaded successfully
UPLOAD_ERR_INI_SIZE value: 1	The uploaded file exceeds the value limited by the upload_max_filesize option in php.ini
UPLOAD_ERR_FORM_SIZE value: 2	The size of the uploaded file exceeds the value specified by the MAX_FILE_SIZE option in the HTML form
UPLOAD_ERR_PARTIAL value: 3	Only part of the file was uploaded
UPLOAD_ERR_NO_FILE Value: 4	No file was uploaded
Value: 5	The uploaded file size is 0

       文件被上传结束后，默认地被存储在了临时目录中，这时您必须将它从临时目录中删除或移动到其它地方，如果没有，则会被删除。

       也就是不管是否上传成功，脚本执行完后临时目录里的文件肯定会被删除。

附：修改PHP上传文件大小限制的方法

1. 一般的文件上传,除非文件很小.就像一个5M的文件,很可能要超过一分钟才能上传完.

       但在php中,默认的该页最久执行时间为 30 秒.就是说超过30秒,该脚本就停止执行.

       这就导致出现 无法打开网页的情况.这时我们可以修改 max_execution_time

       在php.ini里查找

max_execution_time

       默认是30秒.改为

max_execution_time = 0

       0表示没有限制

2. 修改 post_max_size 设定 POST 数据所允许的最大大小。此设定也影响到文件上传。

       php默认的post_max_size 为2M.如果 POST 数据尺寸大于 post_max_size $_POST 和 $_FILES superglobals 便会为空.

       查找 post_max_size .改为

post_max_size = 150M

3. 很多人都会改了第二步.但上传文件时最大仍然为 8M.

       为什么呢.我们还要改一个参数upload_max_filesize 表示所上传的文件的最大大小。

       查找upload_max_filesize,默认为8M改为

upload_max_filesize = 100M

       另外要说明的是,post_max_size 大于 upload_max_filesize 为佳

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