PHP中addslashes()和stripslashes()实现字符串转义和还原用法实例,转义字符的用法
PHP中addslashes()和stripslashes()实现字符串转义和还原用法实例,转义字符的用法
本文实例讲述了PHP中addslashes()和stripslashes()实现字符串转义和还原用法。分享给大家供大家参考,具体如下:
PHP中addslashes() 函数返回在预定义字符之前添加反斜杠的字符串。
预定义字符是:
单引号(')
双引号(")
反斜杠(\)
NULL
stripslashes() 函数删除由 addslashes() 函数添加的反斜杠。
用法示例如下:
<?php $str="select * from `book` where bookname='帮客之家'"; echo $str."<br/>";//输出字符串$str echo $astr=addslashes($str);//字符串转义并输出 echo "<br/>"; echo stripslashes($astr);//将转义字符串还原 ?>
运行结果如下:
select * from `book` where bookname='帮客之家' select * from `book` where bookname=\'帮客之家\' select * from `book` where bookname='帮客之家'
补充:
addslashes()与addcslashes()函数的区别:
这是两个写法非常相近但是使用有所区别的函数,addslashes() 函数返回在预定义字符之前添加反斜杠的字符串,而addcslashes() 函数返回在指定字符前添加反斜杠的字符串,因此addcslashes() 函数需要添加附加参数说明需要添加反斜杠的具体字符。
二者具体区别与用法可参考本站相关文章《解析php addslashes()与addcslashes()函数的区别和比较》
希望本文所述对大家PHP程序设计有所帮助。
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