PHP use of what appears to be an operator "=>"

Question

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Reference - What does this symbol mean in PHP?

Take this snippet of code for instance:

$files[] = array('name' => $d, 'tmp_name' => $fdata['tmp_name'][$i]);

What is the specific definition, name and usage of what only appears to be the operator =>

Answer 1

It's the separator for key-value pairs in arrays. See the docs for more details

Answer 2

The => is an array assignment operator. When you're creating an array with both keys and values, the => maps the key to a value.

For instance:

$example = array("Person" => "SomeKittens");
$example["Person"]  === "SomeKittens"; //true
isset($example[0]);//false.  The 0 index was never set.

Answer 3

It is an assignment operator used in array definitions.

$someVar=array('key1' => 3, 'key2' => 6);

The output is an array with an element called 'key1' and the value of 3 and a second one called 'key2' with a value of 6.