What is the meaning of backslash in MYSQL syntax?-PHP Tutorial-php.cn

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What is the meaning of backslash in MYSQL syntax?

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Aug 18, 2016 am 09:16 AM

mysqlphp

SELECT function_baseurl.id AS id FROM function_baseurl WHERE TRUE

The previous sentence is a colleague’s code. He added backslashes to all fields, making the code particularly ugly. Is there any point in doing this?

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SELECT function_baseurl.id AS id FROM function_baseurl WHERE TRUE

The previous sentence is a colleague’s code. He added backslashes to all fields, making the code particularly ugly. Is there any point in doing this?

Personally, I think this is telling the compiler to wrap the line! It feels like it doesn’t make much sense. Personal opinions are for reference only

Excuse me, is it ` or

<code>` 是 mysql 的转义符，只要你不在列名、表名中使用 mysql 的保留字或中文，就不需要转义
其他数据库也同样有保留字，如使用的话也同样需要转义，只是转义符不同而已</code>

<code>\ 是对字段输入内容的转义，以确保这些数据不会引起程序，特别是数据库语句因为特殊字符引起的污染而出现致命的错误。在magic_quotes_gpc=On的情况下，如果输入的数据有单引号（’）、双引号（”）、反斜线（）与 NUL（NULL 字符）等字符都会被加上反斜线。这些转义是必须的。</code>

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