PHP Tutorials

PHP gets the start timestamp and end timestamp of today, yesterday, last week, this month, mainly using PHP's time function mktime. Let's start with a straight-through example to illustrate how to use Mktime to get the start timestamp and end

The current () function in PHP is to return the element (cell) in the array, each with an internal pointer to its "current" cell, an initial point to the first cell inserted into the array, and if we do this once, the inner pointer points to the

1.PHP Popen How to implement multi-process concurrency execution, the pclose in the loop waits for the process to complete before the next loop 2. Suppose there are 17 processes to open, how to implement 5 processes each time, and each process is

Determines whether the directory is empty, true is null, false is not empty function Is_empty_dir ($fp) {$H = @ opendir ($fp), $i =0, while ($_file=readdir ($H)) {$i + +;} Closedir ($H); if ($i >2) {return false;} Else{return true;}} 1. Determine if

This article mainly introduces the method of calculating the sum and product of the values in the PHP array, and analyzes the function and use of the array_sum and array_product functions in detail in the case form, and a friend can refer to the

The reverse of the PHP array in an article, "How to sort php arrays," we introduced the sort, asort, and Ksort, which are sorted in ascending order of the array, so if you want to implement the reverse of the arrays? Here's another set of functions

The PHP binary conversion function is as follows: Bindec ()-Binary conversion to decimal decbin ()-Decimal conversion to Binary Dechex ()-Decimal conversion to hexadecimal decoct ()-Decimal conversion to octal Hexdec ()-16 binary to decimal oc Tdec (

What is a floating-point (float) data type? Floating-point data types are our common decimals, like "0.7", "100.2" are floating-point data, floating-point data types can be used to store integers or to store decimals. It's more accurate than the

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 time in microseconds. The Time_sleep_until ()

Recently in writing Xiaonei FTP search engine, because of the Chinese character string word, I used a positive inverse combination of methods, the Chinese string needs to be reversed. The internet looked for a bit, looked like, all need to cycle, I

PHP-based applications face a variety of attacks: XSS: Cross-site scripting is a vulnerable point for PHP Web applications. Attackers can use it to steal user information. You can configure Apache, or write more secure PHP code (verify all user

Overload "Overloading" in PHP differs from most other object-oriented languages, except that they all use the same noun. Traditional "overloads" are used to provide multiple class methods with the same name, but each method has a different parameter

If you run curlopt_followlocation in PHP and then get the PHP prompt error message: warning:curl_setopt () [function.curl-setopt]: curlopt_followlocation cannot be activated when in Safe_mode or an open _basedir is set ... The error mentions two

detailed PHP installation and LNMP complete construction-wordpress Install the required Lib library [root@lnmp01 tools]# rpm-qa zlib-devel libxml2-devel libjpeg-devel libjpeg-turbo-devel LIBICONV-DEVELZLIB-DEVEL-1.2.3-29.EL6.X86_64[ROOT@LNMP01

This article mainly describes the Centos7 Http://www.php.cn/php/php-tp-inst installation PHP7 The latest version of the detailed tutorial, one way is simple installation (through Yum), the other way is to compile the installation, the details of the

A very important technique in PHP is to intercept characters of a specified length in a specified string. PHP pre-defined functions for string interception can be used substr ()function to implement. The following is an introduction to the syntax of

Replay attack Replay attacks, sometimes referred to as demo attacks, where an attacker reproduces data sent by a previously legitimate user to the server to gain access or other rights assigned to the user. As with password sniffing, preventing

This paper introduces the use of CSS3 new feature Web-font, and uses the custom Web-font to realize data anti-collection Web-font Introduction Web-font is a marker in CSS3 @font-face, in the @font-face declaration, you can declare a font that

Using Java or. Net Write database applications, many people have used hibernate (or nhibernate) to greatly simplify database programming, and object to read and write database (ORM), Yii provides the active Record (AR) is also a popular

PHP packages a folder into a ZIP file: function Addfiletozip ($path, $zip) { $handler =opendir ($path);//Open the current folder is specified by $path. While (($filename =readdir ($handler))!==false) { if ($filename! = "." && $filename! =