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What does “=>” mean in PHP?

<代码>$k =>v系指?

Answer 1

也就是说,对于可读变量<代码>的每个关键数值乘以,关键值均被分配到<代码>/$k和<编码>>。换言之:

$ex = array("1" => "one","2" => "two", "3" => "three");
foreach($ex as $k=>$v) {
   echo "$k : $v 
";
}

产出:

1 : one
2 : two
3 : three

Answer 2

<代码>k为<代码>v的指数编号。价值储存在一个阵列。可以是阵列的相关指数:

$array[ name ] =  shakti ;
$array[ age ] =  24 ;

foreach ($array as $k=>$v)
{
    $k points to the  name  on first iteration and in the second iteration it points to age.
    $v points to  shakti  on first iteration and in the second iteration it will be 24.
}

Answer 3

你们再 lo一阵。射线有钥匙(编号,或当你有相关阵列时可以加以标示)和属于这些钥匙的价值。

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