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Understanding the "=>" Operator in PHP
In PHP, the "=>" operator plays a crucial role in working with associative arrays. It acts as a separator, allowing you to access both the key and value associated with each element in the array.
Consider the following code snippet:
foreach ($user_list as $user => $pass)
Here, the "=>" operator assigns the key of each array element to the variable $user and the corresponding value to the variable $pass.
For instance, given the following array:
$user_list = array( 'dave' => 'apassword', 'steve' => 'secr3t' );
The code would execute the following loop:
foreach ($user_list as $user => $pass) { echo "{$user}'s pass is: {$pass}\n"; }
This loop would output:
dave's pass is: apassword steve's pass is: secr3t
It's important to note that the "=>" operator can also be used with numerically indexed arrays, effectively mapping each index to a variable. For example:
$foo = array('car', 'truck', 'van', 'bike', 'rickshaw'); foreach ($foo as $i => $type) { echo "{$i}: {$type}\n"; }
This code would output:
0: car 1: truck 2: van 3: bike 4: rickshaw
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