What does $k => $v in foreach($ex as $k=>$v) mean?
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What does “=>” mean in PHP?
What does $k => $v mean?
It means that for every key-value pair in the traversable variable $ex , the key gets assigned to $k and value to $v . In other words:
$ex = array("1" => "one","2" => "two", "3" => "three");
foreach($ex as $k=>$v) {
echo "$k : $v n";
}
outputs:
1 : one
2 : two
3 : three
You're looping over an array. Arrays have keys (numbers, or could be strings when you have an associative array) and values that 'belong' to those keys.
Your $k is the key, the $v is the value, and you're looping trough each separate pair with a foreach.
$k is the index number where the $v value is stored in an array. $k can be the associative index of an array:
$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.
}
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