Are there any potential pitfalls to be aware of when linking variables with arrays in PHP?

One potential pitfall to be aware of when linking variables with arrays in PHP is accidentally overwriting existing array keys. To avoid this, always check if the key already exists before assigning a value to it. This can be done using the isset() function to determine if a key is already set in the array. 

// Example of linking variables with arrays in PHP without overwriting existing keys
$myArray = array();

// Check if key exists before assigning a value
if (!isset($myArray['key'])) {
    $myArray['key'] = 'value';
}

print_r($myArray);

Keywords

variables arrays linking PHP pitfalls

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