What are best practices for handling whitespace in PHP arrays?

When working with PHP arrays, it's important to handle whitespace carefully to avoid unexpected behavior. One common issue is when array keys or values contain leading or trailing whitespace, which can affect comparisons and output. To address this, it's best practice to trim whitespace from array keys and values before using them in your code. 

// Example code snippet to trim whitespace from array keys and values
$array = array(
    '  key1  ' => '  value1  ',
    '  key2  ' => '  value2  '
);

// Trim whitespace from keys and values
$array = array_map('trim', array_map('trim', $array));

// Output the cleaned array
var_dump($array);

Keywords

trim array_map array_filter preg_replace whitespace

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