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php中几个字符处理函数的说明

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Release： 2016-06-21 09:06:05
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函数

字符串分割与连接函数：

代码:
array explode(string delimiter, string data)

使用字符串 dellimiter 把 data 分割成一个数组返回
类似函数：split()

代码:
string implode(array data, string dellimiter)

作用和explode()正好相反，把数组用dellimiter连接成一个长字符串
函数别名：join()

代码:
array split(string pattern, string text[, integer limit])

使用匹配模式pattern的字符作为分隔符，把字符串text分割成数组
limit 可选参数，限制分割的段数

字符串编解码函数：

代码:
string addslashes(string text)

在字符串text中的特殊字符之前加“\”返回，特殊字符包括 ('), ("), (\)。
类似函数：quotemeta()

代码:
string stripslashes(string text)

和addslashes()函数正好相反，去掉反斜杠编码

代码:
string quotemeta(string text)

类似于addslashes()，区别在于它的特殊字符包括： . \ + * ? [ ] ^ ( ) $

代码:
string escapeshellcmd(string command)

在所有有可能在shell命令中引起麻烦的字符前加反斜杠。
用于exec(), system()等函数之前。

代码:
string mysql_escape_string(string text)

把一个SQL字符串转义，以安全用于mysql_query()

HTML 相关函数

代码:
string htmlentities(string text)

转换所有HTML实体

代码:
string htmlspecialchars ( string string [, int quote_style [, string charset]])

转换特定字符为HTML实体
quote_style: (ENT_COMPAT|ENT_QUOTES)
quote_style默认值：ENT_COMPAT 转换&
当quote_style为：ENT_QUOTES时，除转换以上字符外还转换 " and '

代码:
string trim(string text)

去掉字符串text开始和结束处的空字符

代码:
string ltrim(string text)

去掉字符串text开始处的空字符

代码:
string rtrim(string text)

去掉字符串text结束处的空字符

代码:
string chop(string text)

函数rtrim()的别名



Related labels：
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