How does PHP handle nested arrays in terms of string interpolation?

When dealing with nested arrays in PHP, string interpolation can become tricky as the variables may not be directly accessible. To solve this, you can use curly braces within the string to access the nested array values. By using curly braces and specifying the keys of the nested arrays, you can properly interpolate the values into the string. 

$nestedArray = [
    'outer' => [
        'inner' => 'value'
    ]
];

echo "Nested array value: {$nestedArray['outer']['inner']}";

Keywords

PHP nested arrays string interpolation multidimensional arrays concatenation

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