PHP

Understanding of PHP garbage collection mechanism. PHP garbage collection mechanism is only available after php5. I will introduce some understanding about PHP garbage collection mechanism and hope to help you. PHP garbage collection mechanism was

Php sample code for downloading files. Copy the code as follows :? Php?filemonkey.gif; if (file_exists ($ file) {header (Content-Description: FileTransfer); header (Content-Type: applicationoctet-stream); head The code is as follows: $ File =

PHP Miscellaneous refactoring-improving the design of existing code-2 moving between objects. Mind Map Index: MoveMethod (shift function) MoveField (shift value field) ExtractClass (Extract class) InlineClass (class inassociation, is to merge the

PHP version of the website cache to speed up the opening of the way to share. Note: 1. the compressed files are cached on the server, and the re-access time is reduced to reduce the re-compression time, reducing the CPU usage. 2. reduce the number

A useful PHP anti-injection vulnerability filtering function code. Copy the code as follows :? PHPPHP anti-injection program for the entire site. in the public file, require_once is used to determine the magic_quotes_gpc status. if (@

Php regular expression matching Chinese problem analysis summary. Copy the code as follows: $ str People's Republic of China 123456789 abcdefg; echopreg_match (^ [u4e00-u9fa5_a-zA-Z0-9] {}$, $ strName); run the above code to see what The code is as

Those years of learning PHP together (2 ). Now we start our PHP coding journey in the Linux World. there will be various problems in coding, and the time to solve the problem is also the time for us to change from new to new. Every program now

An interesting date logic processing in php. Today we have handled a very small problem. This is the requirement. from Monday to Sunday, only data from last Monday to last Sunday can be seen. Here, the query range based on the date field in the

Php reference address to change the variable value. Copy the code as follows :? Php $ fooBob; assign Bob to $ foo $ bar and reference $ fooecho $ foo.br through $ bar; $ barMynameis $ bar; modify the $ bar variable echo $ bar. The code is as

PHP design mode registry mode (registration of multiple classes ). I have written a registry class before, but that one cannot register multiple classes. the classes are stored using arrays below. Copy the code as follows :? I have also written a

Use PHP to manage Ftp users online. The idea of online registration and file upload is to use web forms to collect user-filled information and store it in the Mysql database, at the same time, using the user's registration name to create an FTP

Write high-quality PHP programs. 1. security no matter what the program writes, security is the first priority. programs without security assurance cannot talk about high quality. 2. stability no matter what code you write is worse, it must be

You can use GET to refresh the page deletion conditions when deleting page records in php. Function: 1. display the queried data on a page, and add the delete function after each data entry. click delete to delete the data, refresh the page at the

How to solve the problem of garbled characters in the string intercepted by PHPsubstr [utf8 and gb2312]. Substr --- obtain part of the string syntax: stringsubstr (stringstring, intstart [, intlength]) description: substr () returns a part of the

Summary of several methods for PHP to determine whether a remote url is valid. Solution: Use PHP to solve the problem of using the file_get_contents function. However, if the url cannot be accessed, the program will be terminated and curl will be

PHP command line tool shell_exec, exec, passthru, detailed usage of system. All these commands are derived from a sub-process used to run your specified commands or scripts, and each sub-process will capture them when the command output is written

When using ThinkPHP in linux, pay attention to the case sensitivity issues. After an afternoon, I accidentally remembered that linux recognized file case sensitivity. I checked the code and found that I didn't pay attention to file case sensitivity

Deduplicated PHP two-dimensional arrays. Previously I wrote an article about array deduplication, but it is limited to one-dimensional arrays. The following function can be used for two-dimensional arrays: The copy code is as follows: before

PHP performance optimization produces highly optimized code. 1. the easiest way to upgrade PHP to the latest version to improve performance is to continuously upgrade and update PHP versions. 2. there are many reasons for the slow running of

Php custom functions call_user_func and call_user_func_array. The call_user_func function is similar to a special method for calling a function. use the following method: Copy the code: functiona ($ B, $ c) {echo $ B; echo $ c ;} call_user_func (a, 1