what is in php

For details about $ str in php, refer to str in php. $ In $ str in php. in php, str is called Variable variables. sometimes it is very convenient to use variable names. That is to say, the variable name of a variable can be dynamically set to "$" in

Common string operation functions in PHP development. 1. concatenating string concatenation strings is one of the most common string operations. in PHP, you can concatenate strings in three ways: dots. separator {} operation, dot equal sign 1,

Double colon: usage in PHP and usage in php. Double colon: usage in PHP. a few days ago, I saw someone asking about the usage of double colon: in php, at that time, his answer was concise because the mobile phone had a double colon: usage in PHP,

The 10 most common errors in PHP programming. 10 most common errors in PHP programming this article lists some of the most common errors in php programming. This article lists 10. Error 1: After the foreach loop, the top 10 most common errors in for

Common string operation functions in PHP development, and string functions in php development. Common string operation functions in PHP Development. string function 1 in php Development. concatenating string concatenation strings is one of the most

Comparison and usage analysis of strcmp () and strcasecmp () function strings in PHP, strcmpstrcasecmp. Comparison and usage analysis of strcmp () and strcasecmp () function strings in PHP. This document describes the comparison and usage of strcmp (

In PHP 4.2, they canceled that old practice! As I will explain in this article, the purpose of making such a change is for security reasons. We'll look at the new approach to PHP when it comes to processing form submissions and other data, and

In-depth understanding of ini configuration in php (1)This article does not describe the purpose of an ini configuration item in detail. These are all covered in the manual. I just want to explore the implementation mechanism of php from a specific

PHP is a managed language. In PHP programming, programmers do not need to manually allocate and release memory resources (except for PHP or Zend extensions written in C ), this means that PHP implements the Garbage Collection mechanism (Garbage

Several Notes for using PHP constants (Be careful when using constants in PHP) and constants in php Why be careful when using constants in PHP? The Zend Framework document states that a constant contains numbers, letters, and underscores. A number

Common string operation functions in PHP development, and string functions in php Development 1. concatenate stringsConcatenating strings is one of the most common string operations. In PHP, You Can concatenate strings in three ways: Dots. separator

Teach you how to implement the verification code in php and implement the verification code in php. It is inconvenient to teach you how to implement a verification code in php. more and more verification codes are implemented in forms, so I learned

Three functions that I often confuse in PHP, and three functions obfuscated in PHP. Three functions that I often confuse in PHP: www.ido321.com1252.html 1. htmlentities () and htmlspecialchars () 1. htmlentities () 1.1: three functions that I often

Collect common functions in PHP and common functions in PHP. Common functions in PHP are collected. common functions in PHP are collected. php time date y returns the last two digits of the year, and Y returns the fourth digits of the year. some

8 little-known security function analysis in PHP and little-known functions in php This article describes eight little-known security functions in PHP. Share it with you for your reference. The specific analysis is as follows: Security is an

Welcome to the Linux community forum and interact with 2 million technical staff. use Chinese as the variable name in php: So are other languages in php. Generally, we define variables as letters and numbers, it may consist of underscores (_), but

The exception mechanism in php can only be regarded as an alternative. The exception mechanism is rarely discussed in the php book, and most of them only stay in the syntax stage. Some people praised the exception of php as a good thing, and some

Getting Started with curl in PHP tutorial This article mainly introduces the use of curl in PHP tutorial, this article explains Curl overview, installation curl, PHP using curl, a simple example of curl code, and so on, the need for friends to

The most frequently used data types in PHP are non-strings and arrays. PHP is easier to use and also benefits from the flexible array types. It is necessary to introduce the hash table (HashTable) before giving a detailed introduction to these data

Analysis of the 10 most common mistakes in PHP programming 10 Currently learning PHP a lot of friends, in peacetime daily program development project always encounter a variety of problems, this experience will introduce PHP development in the 10