Php双引号和单引号的区别？
- WBOYOriginal
- 2016-06-21 08:56:581456browse
什么时候用单引号，什么时候用双引号呢？我看有时候又在混用，又时候又不行。
$a=1;
echo '$a';
echo "$a";
?>
单引号里的会原样输出，双引号里的如果含有变量，会输出变量的值
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