PHP中单引号与双引号实例用法
""双引号里面的字段会经过编译器解释,然后再当作HTML代码输出。
'' 单引号里面的不进行解释,直接输出。
单引号和双引号都有自己的用途。
单引号的内容不会被解析,效率更高。
如下面代码:
$url='http://www.bkjia.com';
//单引号输出
$output= '$url';
echo '单引号输出:'.$output.'
';
//双引号输出
$output="$url";
echo "双引号输出:".$output;
?>
输出如下:

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