PHP Tutorials

1.google Open API Copy CodeThe code is as follows: $urlToEncode = "http://bbs.lewanchina.com"; Generateqrfromgoogle ($urlToEncode); function Generateqrfromgoogle ($chl, $widhtHeight = ' Max ', $EC _level= ' L ', $margin = ' 0 ') { $url = UrlEncode (

As shown below: Copy CodeThe code is as follows: $rndstring = "; for ($i =0; $i If GD is supported, the drawing if (function_exists ("Imagecreate")) { Firefox part of the situation will be asked multiple times, the refresh page within 5 seconds

The NL2BR () function converts a line break in a string to a newline symbol in HTML Copy CodeThe code is as follows: $str = "It's been raining in recent days, it's sad. , the ball is not playing, and the shoes are soaked. "; Echo $str; echo

StraceIs LinuxA program debugging tool in the environment that monitors the system calls used by an application and the system information it receives. Strace is a useful gadget that allows you to know what a program does in the background by

As shown below: Copy CodeThe code is as follows: The Usleep () function delays code execution for several microseconds. The unpack () function unpack the data from a binary string. The Uniqid () function generates a unique ID based on the current

If your URL link is relative to the path "Static/mapi.css", you want to replace him in bulk with the absolute path "http://dev.baidu.com/wiki/static/map/cloud/static/mapi.css". Well, you can do this: Write a php file and write the URL you want to

Summary of tips for optimizing PHP code1. If a method can be static, then declare that he is static, the speed can be increased by 1/4; 2. Echo is more efficient than print, because Echo has no return value, and print returns an integer type; 3. Set

Viewer mode:Defines a one-to-many dependency between objects, and when an object's state changes, all objects that depend on it are notified and updated automatically. Viewer class:1. Abstract theme role: The subject role saves all references to

Parameter filtering Filter cat_id=2$CL->setfilter ("cat_id", Array (2));Search only in sub-forums with IDs 1, 3, 7$CL->setfilter ("forum_id", Array (1,3,7));Range filteringFilter publish time is today, parameter is int timestamp$CL->setfilterrange (

The difference between ph and C # value copy (if it's wrong, look!) ) $a = 2; $b = $a; In PHP, the address of B points to a so B is equal to 2 at this time; the difference is here. $a = 5; The value of a in PHP is then re-written value, so the PHP

MySQL root account, I usually use the connection is localhost or 127.0.0.1, the company's test server mysql is also localhost so I want to access inaccessible, test paused. Workaround: 1, modify the table, log in to the MySQL database, switch to

Factory mode: By the factory class according to the parameters of the decision to create an example of which production classFactory class: A method class that is designed to create other objects. That is, on demand, incoming parameters to select,

The basic idea of exchange sorting: 22 Compare the data to be sorted, if reverse order occurs, then swap until all the data is sorted. • The basic idea of bubble sorting:1. From the forward, scan all the data, if the adjacent two numbers occur in

What the individual thinks is the cause of the impact: The URL that matches to the image is not a valid URL, the text is only simple to determine whether it is a relative path, but some URLs are invalid Workaround: A new image that determines

As shown below: Copy CodeThe code is as follows: Header (' context-type:text/html;charset:gb2312; '); $urls = Array ( ' http://www.baidu.com/', ' http://www.pconline.com.cn/', ' http://www.163.com/' ); $options = Array ( Curlopt_returntransfer=>1,

Many times we need to encrypt and decrypt data, such as some data that needs to be saved to a cookie, but not easily accessible by the user, and we need to encrypt the data to be stored in a cookie, and then decrypt it when we need to use it. The

Copy CodeThe code is as follows: Two-dimensional code generation-www.ibtf.net $content =$_get[' content '; $width =$_get[' width ']?$_get[' width ']:300; $height =$_get[' height ']?$_get[' height ']:300; if ($content)

"Cause": Because PHP ' s integer type is signed, and many IP addresses would result in negative integers. "Workaround": it is mentioned in its official manual that you can "need to use the"%u "Formatter of sprintf () or printf () to get the string

PHP is a weak type of language. This is the advantage and feature of it, but sometimes you have to convert the type accordingly. That's when the problem comes. Because in many cases, you will find that the data obtained after the conversion type

Have done a lot of crawling other site content products, accustomed to the use of quick and easy file_get_contents function, but always encounter the problem of getting failed, although the example set by the manual time-out, can not be effective