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MySQL和PHP中的substr

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2016-06-07 16:52:561172browse

substr:字符串截取函数。substr($str,$start,$end)MySQL中的substr函数中如要从第一个字符开始截取,则第一个参数应该为1;PHP中

substr:字符串截取函数。substr($str,$start,$end)

MySQL中的substr函数中如要从第一个字符开始截取,则第一个参数应该为1;

PHP中的substr函数中如要从第一个字符开始截取,则第一个参数应该为0;

注意,MySQL 5.x才开始支持substr,如果MySQL是4.x,则可以使用left($str,$length)

mysql 5.x => substr("abc",1,1)=a

mysql 4.x => left("abc",1)=a

PHP => substr("abc",0,1)=a

PS:查看MySQL版本:select VERSION()

select SUBSTRING(cpcode,2) from T_PROVINCE_MATERIAL where province_id=5

mid也行的

还有right(),left(),都可以,分别是从右边取和从左边取 

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