Should I use array() or [] to declare arrays in PHP?

PHP: Understanding array() vs. []

In PHP development, ensuring code compatibility and avoiding errors is crucial. This question arises frequently: is there a difference between using array() and [] for arrays? Let's delve into the details.

Equivalent Array Declarations

PHP supports both array() and [] syntax for array declarations, and both are interchangeable when working with arrays. For instance, the following two statements result in identical arrays:

<code class="php">$data = array('name' => 'test', 'id' => 'theID');
$data = ['name' => 'test', 'id' => 'theID'];</code>

PHP Version Compatibility

However, it's important to note that the short array syntax [] was introduced in PHP 5.4. Therefore, if your PHP version is less than 5.4, using [] will result in an error.

Usage in Echoing

As for the short PHP tag =, it can be used to echo results without explicitly specifying the echo statement. It's generally accepted as an alternative to echo and works similarly. However, it should be noted that = and can be disabled for security reasons. Check your PHP configuration to ensure they are enabled before relying on them.

In Summary

• array() and [] are interchangeable for array declarations, with [] being supported in PHP 5.4 and above.
• The short PHP tag = can be used for echoing, but verify its availability in your PHP configuration.
• Using the appropriate syntax based on your PHP version prevents errors and ensures code compatibility.

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