PHP

We sometimes need to record the operation of a user or an action event on the back end, and you can use the back-end language such as PHP to log the results of the operation to a journal file to facilitate testing and locating problems. In

1. Use header header to set cache control header Cache-control. PHP code1. The code is as follows Copy Code Header (' Cache-control:private, Must-revalidate '); Support page Bounce 2. Use the

Export Excel Usage Set environment variable (add Phpexcel) The code is as follows Copy Code Set_include_path ('. ') Path_separator. Yii::app ()->basepath. ' /lib/phpexcel '. Path_separator.Get_include_path ());Note: In

The date () function makes it easy to get the data above The code is as follows Copy Code $month = $_get[' m ']?$_get[' m ']:d ate (' n ');$year = $_get[' y ']?$_get[' y ']:d ate (' Y '); $start _week = Date (' W ',

An example is provided:In the Windows environment: Originally in the php4.3.0 of the program, in the 4.3.1 Why many errors, the general hint is: notice:undefined varialbe: variable name. For example, code that resembles the following:

The code is as follows Copy Code Connecting to a database$conn = mysql_connect ("localhost", "phpdb", "phpdb");mysql_select_db ("Test", $conn);?>?Get the parameters of a Web page$id =$_post[' id ']; Determine if the user name

function Listfolders (){Set a path$dir = "./"; Set up an array of file pieces$aDir = Array (); $oCurrentdir = Opendir ($dir); Open Directory while ($sFile = Readdir ($oCurrentdir))//Read all subdirectories of the current directory{if ($sFile!= '.

WAP (Wireless Communication Protocol) is an open global standard protocol for communication between digital mobile phones, personal handheld devices (PDAs, etc.) and computers. With the continuous development of wireless communications, static WAP

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How to use1 Create a Web project, named Jqueryuploaddemo, download the latest version from the official web and add it to the project after decompression2 Add the Uploadhandler.ashx file to the project to process the upload of the file.3 Add the

PHP's Unicode decoding program free download function Utfdecode ($url)//unicode decoding{Preg_match_all ('/%u ([: Alnum:]]{4})/', $url, $a);foreach ($a [1] as $uniord){$dec = Hexdec ($uniord);$utf = ';if ($dec {$utf = Chr ($DEC);}else if ($dec

PHP while loop next The number of times specified in the block of code that is being executed, or if the specified condition is true. -------------------------------------------------- ------------------------------ PHP's LoopsMany times, when

The PHP switch syntax is used to perform actions based on different conditions. -------------------------------------------------- ------------------------------ PHP for switch statementsUsing the switch statement to select one of the many

There was a problem at work today because our project data is so small that we need to borrow data from web search, and they only provide us with an XML interface. Therefore, we need to transform the XML data into HTML to present to everyone.

Direct installation: CentOS Installation: The code is as follows Copy Code Rpm-qa |grep PHP-GD If it does not exist then execute the following: The code is as follows Copy Code Yum

We know in PHP, variables usually do not need to define the direct use, but sometimes because of the PHP environment problems will appear all kinds of strange things, today in the debugger directly prompts notice:undefined variable error, This is

If you call the json_encode () function that comes with PHP, when you encounter a Chinese character, the Chinese character will be escaped. For example:Echo json_encode (array (' '));// Output: ["\ u4f60 \ u597d"]This is very annoying, like a bunch

Example$ Str = preg_match_all ('/( ).*? ()/is ', $ str, $ array );If (is_array ($ arrayList [0]){}Result discoveryNotice: Array to string conversion in E: \ get_data.php on line 45Notice: Undefined variable: Array in E: \ get_data.php on line

1. php curl ipv4 example The code is as follows:Copy code /*** Http Test* Note: Only the PHP version 5.2 or later supports CURL_IPRESOLVE_V4.* @ Param $ url: website domain name* @ Param $ type: Website Access Protocol* @ Param $ ipresolve