双引号内不用内插数组值吗?
本帖最后由 yakczh 于 2011-05-08 20:05 编辑
$arr=array('username'=>'me');
$value= " value is $arr['username']";
直接报错
$arr=array('username'=>'me');
$value= " value is $arr['username']";
直接报错
作者: yakczh 发布时间: 2011-05-08
查了下手册,内插有两种规则,
简单规则 $arr[username]
复杂规则 {$arr['username']}
顺便比较了一下各种写法的效率,时间是运行10000次的累计值
echo 'value is'.$arr['username']; [elapse] => 0.13587594032288
echo "value is {$arr['username']}"; [elapse] => 0.11077213287354
echo "value is $arr[username] "; [elapse] => 0.11252403259277
简单规则 $arr[username]
复杂规则 {$arr['username']}
顺便比较了一下各种写法的效率,时间是运行10000次的累计值
echo 'value is'.$arr['username']; [elapse] => 0.13587594032288
echo "value is {$arr['username']}"; [elapse] => 0.11077213287354
echo "value is $arr[username] "; [elapse] => 0.11252403259277
作者: yakczh 发布时间: 2011-05-08