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Home > Backend Development > PHP Tutorial > 【PHP】遇到了一些特殊字符 "ESC" "BEL"

【PHP】遇到了一些特殊字符 "ESC" "BEL"

WBOY
Release： 2016-06-20 12:32:20
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我这里有一段代码 

$str =strtr($str,array(    "\n"  => "\\n",    "" => " ",    "" => " "));
Copy after login

实际上数组上那两个并不为空格字符,可以把代码拷贝到sublime text里面去显示,就会发现如下图所示



这里有个问题,
我们如何打出这两个字符呢?
这些个字符分别代表什么意义?


回复讨论(解决方案)

ESC chr(27) 0x1b 转义
BEL chr(7) 0x07 响铃
都是 ASCII 控制符

谢谢啦,我刚刚也找到答案了.

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【PHP】遇到了一些特殊字符 "ESC" "BEL"
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