几个与特殊字符处理相干的PHP函数
几个与特殊字符处理有关的PHP函数
函数名 | 释义 | 介绍 |
htmlspecialchars | 将与、单双引号、大于和小于号化成HTML格式 | &转成& "转成" ' 转成' |
htmlentities() | 所有字符都转成HTML格式 | 除上面htmlspecialchars字符外,还包括双字节字符显示成编码等。 |
addslashes | 单双引号、反斜线及NULL加上反斜线转义 | 被改的字符包括单引号 (')、双引号 (")、反斜线 backslash (\) 以及空字符NULL。 |
stripslashes | 去掉反斜线字符 | 去掉字符串中的反斜线字符。若是连续二个反斜线,则去掉一个,留下一个。若只有一个反斜线,就直接去掉。 |
quotemeta | 加入引用符号 | 将字符串中含有 . \\ + * ? [ ^ ] ( $ ) 等字符的前面加入反斜线 "\" 符号。 |
nl2br() | 将换行字符转成 |
|
strip_tags | 去掉HTML及PHP标记 | 去掉字符串中任何 HTML标记和PHP标记,包括标记封堵之间的内容。注意如果字符串HTML及PHP标签存在错误,也会返回错误。 |
mysql_real_escape_string | 转义SQL字符串中的特殊字符 | 转义 \x00 \n \r 空格 \ ' " \x1a,针对多字节字符处理很有效。mysql_real_escape_string会判断字符集,mysql_escape_string则不用考虑。 |

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