PHP Tutorials

The so-called sensitive character refers to: In the article contains unhealthy or reactionary information, the impact of social information, will be considered sensitive characters. Because sometimes the user input sensitive characters will affect

This article mainly introduces the pseudo-random number and the true random number of PHP, this article first explains the true random number and pseudo-random number of the relevant concepts, and gives a better pseudo-random number than the Mt_rand

This article focuses on how to use PHP to generate n non-repeating random number instances , the code is as follows: The program runs as follows: The code is as follows: 2,3,4,6,7,8,9,10,11,12,13,16,20,21,22,24 The Adds several notes: the

The fgets () function reads a row from the file pointer. The explode () function breaks a string into arrays. The following instance code uses the Fgets () function to split a string into an array using the explode () function after reading the

What is polymorphic? Polymorphism (polymorphism) literally means "multiple states." In object-oriented languages, many different implementations of interfaces are polymorphic. The description of polymorphism is referenced by Charlie

Recently write PHP code to read text lines from a text file (text file is the ANSI character set) PHP 2 built-in functions file and fgets can implement this function file-to read an entire file into an array fgets-reading a line from the file

What is an interface (interface)? Interfaces are abstractions of methods, and if different classes have the same method, then you should consider using interfaces.(1) An interface is a specification and protocol for a behavior. is actually a kind

There is a function called Strtotime in PHP. Strtotime implementation: Gets the timestamp of a date, or gets the timestamp of a time. Strtotime to parse the datetime description of any English text into a UNIX timestamp Write the program today,

The Set_error_handler () function sets the user-defined error-handling function. This function is used to create the user's own error handling method during runtime. The function returns the old error handler and, if it fails, returns null The

This article mainly introduces PHP implementation of the two-fork tree traversal algorithm, combined with specific examples of PHP for binary tree commonly used in the pre-order, middle sequence and post-order traversal algorithm implementation

OpenSSL is a Secure Sockets Layer cipher library that includes key cryptographic algorithms, common key and certificate encapsulation management functions, and SSL protocols, and provides a rich set of applications for testing or other

The following small series for everyone to bring a PHP recursive traversal in the specified folder file implementation method. Small series feel very good, now share to everyone, also for everyone to make a reference. Let's take a look at it with a

Simply summarize the differences between Echo () and the easy-to-confuse functions like print (), require (), and include () the difference between 1.echo and printThe functions of Echo and print in PHP are basically the same (output), but there

This article mainly introduces PHP using the explode () function to split the string into an array of methods, with a certain reference value, the need for friends can refer to the following This example describes how PHP uses the explode ()

Overview In object-oriented programming, PHP provides a series of magic methods that provide a lot of convenience for programming. The Magic method in PHP usually starts with (two underscores) and does not require a display of calls but a certain

Definition and Usage The PHP debug_backtrace () function generates a backtrace (backtracking information). The function returns an associative array. The following are the elements that might be returned: Name Type Describe

The Array_intersect () function is used to compare the key values of two (or more) arrays and return the intersection. The function compares the key values of two (or more) arrays and returns an array of intersections that contain all the key values

This article gives you a summary of the PHP array function array_key_exists () knowledge and performance comparison with In_array, and the isset of the difference analysis, very detailed, the need for small partners can refer to. The

Check whether the file or directory exists, we use PHP commonly used function file_exists, this function can realize I want to function, below everybody slowly reference The following is an example code that checks whether a file exists: The code

This article mainly introduces the use of the PDO connection Sqlite3 configuration method, combined with the case form a more detailed analysis of PHP based on PDO operation Sqlite3 related considerations, the need for friends can refer to the