php add character to middle of string

php Execution Principle PHP is a very simple application, the development of a very high efficiency of a language, its weak type of variable can save the programmer a lot of time and effort to define variables, type conversion and so on. It is a

The number of PHP components and frameworks is incredibly large. There are mega-frameworks like Symfony and Laravel, as well as miniature frameworks like Silex and slim. There are even traditional frameworks that have existed long before modern PHP

Summary of knowledge accumulation during PHP beginners. PHP Basics 1. PHPPHP is an embedded language mixed with HTML. 1. what are the default PHP mark? Php? Short Mark ??, You need to enable the short_open_tag option in php. ini and its PHP

PHPpreg_replace () regular replacement string. Data processed by a program is not always designed in advance by the database, or cannot be stored using the database structure. For example, Template engine parsing templates and junk sensitive

PHP operating mechanism and principle (underlying), and php operating mechanism. The PHP operating mechanism and principle (underlying). when talking about the php operating mechanism, we should first introduce the php module. php has three modules

This article we mainly share with you the PHP bottom operating mechanism of the detailed, first we will share with you PHP design concept and features, PHP four layer system, etc., hope to help everyone. 1. PHP Design concept and Features

What is a regular expression?Regular expressions, also known as formal representations, general representations (English: Regular Expression, often abbreviated as regex, RegExp, or re) in code, are a concept of computer science. A regular expression

In this article, I have accumulated some knowledge and experience when I was a beginner in PHP. For more information, see In this article, I have accumulated some knowledge and experience when I was a beginner in PHP. For more information, see

First, Let's take a look at two special characters: ' ^ ' and ' $ ' they are used to match the start and end of the string, respectively, to illustrate "^the": matches a string that starts with "the";"Of despair$": matches a string ending with "of

PHP BasicsFirst, the initial knowledge of PHPPHP is an embedded language that is used in combination with HTML.1, PHP tagsThe default tag short mark.??, you need to turn on the Short_open_tag option to open short and other tags in php.ini is not