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PHP exec() vs system() vs passthru()
... portability has to be sacrificed for functionality. There are some things PHP just can't do well.
– Frank Crook
Apr 9 '09 at 5:10
30
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How can I run a PHP script in the background after a form is submitted?
...using the following line to invoke the email script:
shell_exec("/path/to/php /path/to/send_notifications.php '".$post_id."' 'alert' >> /path/to/alert_log/paging.log &");
It is important to notice the & at the end of the command (as pointed out by @netcoder). This UNIX command runs ...
Manipulate a url string by adding GET parameters
...
Basic method
$query = parse_url($url, PHP_URL_QUERY);
// Returns a string if the URL has parameters or NULL if not
if ($query) {
$url .= '&category=1';
} else {
$url .= '?category=1';
}
More advanced
$url = 'http://example.com/search?keyword=test&...
How can I capture the result of var_dump to a string?
...
Use output buffering:
<?php
ob_start();
var_dump($someVar);
$result = ob_get_clean();
?>
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PHP 5.4 Call-time pass-by-reference - Easy fix available?
... call by reference in the function definition, not the actual call. Since PHP started showing the deprecation errors in version 5.3, I would say it would be a good idea to rewrite the code.
From the documentation:
There is no reference sign on a function call - only on function definitions. F...
Add Text on Image using PIL
...
To add text on an image file, just copy/paste the code below
<?php
$source = "images/cer.jpg";
$image = imagecreatefromjpeg($source);
$output = "images/certificate".rand(1,200).".jpg";
$white = imagecolorallocate($image,255,255,255);
$black = imagecolorallocate($image,7,94,94);
$font_siz...
PDO MySQL扩展模块 检测通不过？ - PHP - 清泛IT论坛，有思想、有深度
php.in中下面两行已经放开注释：
extension=pdo.so
extension=pdo_mysql.so
PDO检测仍然通不过。
终极解决方案：
php编译时加上如下参数，重新编译安装php：
--with-pdo-mysql
php编译安装完整参数请参见：http://www.tsingfun.com/html/2015/env_0826...
What is the difference between MySQL, MySQLi and PDO? [closed]
...
There are (more than) three popular ways to use MySQL from PHP. This outlines some features/differences PHP: Choosing an API:
(DEPRECATED) The mysql functions are procedural and use manual escaping.
MySQLi is a replacement for the mysql functions, with object-oriented and procedur...
Allowed memory size of 33554432 bytes exhausted (tried to allocate 43148176 bytes) in php
...the answer:
Just add this line before the line where you get error in your php file
ini_set('memory_limit', '-1');
It will take unlimited memory usage of server, it's working fine.
Consider '44M' instead of '-1' for safe memory usage.
...
ZMQ: 基本原理 - 开源 & Github - 清泛网 - 专注C/C++及内核技术
...层传输之上提供完全相同的行为。
这种方法存在两个问题：
一，在特定的传输之上建立类TCP的封装实际上使得传输成为多余的了。如果这种方法的行为类似于TCP，那么为什么一开始就不用TCP呢？（性能特性排除在这个规...