Recommended articles about php special characters

There have been many regular expression symbols before. This article will give you a summary of all commonly used symbols. All Symbol Interpretation Characters Description \ Marks the next character as a special character, a literal character, a backreference, or an octal escape character. For example, 'n' matches the character "n". '\n' matches a newline character. The sequence '\\' matches "\" and "\(" matches "(". ^ Matches the beginning of the input string. If the Multiline property of the RegExp object is set, ^ also matches '\n' or '\r' The position after. $ matches the end of the input string. If the Multiline property of the RegExp object is set, $ also matches the position before '\n' or '\r' * &

##1. . 10 recommended content about the use of escape characters

##Introduction: There have been many before Symbols of regular expressions, this article will give you a summary of all commonly used symbols. All symbol explanations. Character descriptions. Mark the next character as a special character or a primitive. character, or a backreference, or an octal escape character. For example, 'n' matches the character "n". The sequence '\\' matches "\" and "\(" then matches "(".   ...

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10 recommended articles about the php trim() function

Introduction: The string function trim() removes blank characters or other predefined characters on both sides of the string. This is what we do in our program development. Very important, this article has collected several articles about the usage of PHP string function trim(). I hope it will be helpful to everyone's understanding of the trim() function. Let's take a look at it. 1. Remove leading and trailing spaces and special characters from the string. The PHP function trim() of characters usually allows users to enter data in forms or other text boxes. Spaces or other special characters may be entered accidentally. In some cases, these are not allowed in strings. Appears...

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About some problems encountered during the installation and use of Oracle database on Windows

Introduction: Oracle software is free, and you can download the corresponding installation package from the official website. However, if you use it for commercial purposes, you need to purchase a license from the official website. , both 32-bit and 64-bit. If you are using Windows, you will generally download two files. Taking Oracle 11g as an example, there are two zip files. Please pay attention to decompressing and merging the contents of the two compressed files before installation. The server configuration must display at least 256 colors, which can be ignored. Other pre-installation items may crash. I don’t know why, so I can only change the operating system. Note that the installation directory cannot be a directory name with spaces or special characters, such as C:\Oracle\. Currently I am on Server 2008

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The encoding corresponding to the HTML characters

Introduction: This article shows you the encoding corresponding to HTML special characters, I hope it will be helpful to your learning

##5. Comparison table of special characters, regular symbols and their codes

##Introduction: special characters, regular symbols and their codes Comparison table

6. Using regular expressions to search and match tutorial in mysql (3)

简介：匹配特殊字符  正则表达式语言由具有特定含义的特殊字符构成。我们已经看到.、[]、|和-等，还有其他一些字符。请问，如果你需要匹配这些字符，应该怎么办呢？例如，如果要找出包含.字符的值，怎样搜索？请看下面的例子：  输入：

7. mysql中使用通配符进行过滤教程

简介：什么是通配符？  通配符就是用来匹配值的一部分的特殊字符。  搜索模式：由字面值、通配符或者两者组合构成的搜索条件。

8. php从文本中去除空格、特殊字符的4种情况

简介：在日常的开发中，处理一些提交的内容时，经常需要考虑其中的空白内容。因为如果提交的数据存在空白，则会给程序造成问题。例如，用户在填写邮箱的时候，在结尾或者开始的时候不  小心加上了空格，那么就会导致用户提交的电子邮箱不正确，那么为了避免这种情况的存在，我们就要将用户提交过来的数据将空格去掉。本章，就给大家介绍几种怎么去除空格的方法？

9. 正则表达式中全部符号解释

简介：之前出现了很多正则表达式的符号，这篇文章将给大家汇总介绍一下所有常用符号。  全部符号解释  字符    描述      \    将下一个字符标记为一个特殊字符、或一个原义字符、或一个 向后引用、或一个八进制转义符。例如，’n’ 匹配字符 “n”。’\n’ 匹配一个换行符。序列 ‘\\’ 匹配 “\” 而 “\(” 则匹配 “(”。

10. 非打印字符、特殊字符、限定符实例用法（正则表达式字符集2）

简介：非打印字符  字符    含义      \cx    匹配由x指明的控制字符。例如， \cM 匹配一个 Control-M 或回车符。x 的值必须为 A-Z 或 a-z 之一。否则，将 c 视为一个原义的 ‘c’ 字符。      \f    匹配一个换页符。等价于 \x0c 和 \cL。      \n    匹配一个换行符。等价于 \x0a 和 \cJ。

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