How should array values be written in PHP when used within a string?

When using array values within a string in PHP, you should use curly braces `{}` around the array variable to ensure that the array value is correctly interpolated into the string. This is necessary to prevent syntax errors and ensure that the array value is displayed as intended within the string. 

// Example of how to correctly use array values within a string in PHP
$array = [1, 2, 3];
echo "The first element of the array is {$array[0]}";

Keywords

PHP array values string concatenation interpolation

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