What are the potential pitfalls of using quotation marks in PHP when working with multidimensional arrays?

Using quotation marks in PHP when working with multidimensional arrays can lead to syntax errors or unexpected behavior. It is important to use the correct syntax for accessing array elements, which involves using square brackets instead of quotation marks. To avoid pitfalls, always use square brackets when accessing elements in multidimensional arrays. 

// Incorrect usage of quotation marks
$array = ['key1' => ['key2' => 'value']];
echo $array['key1']['key2']; // This will work

// Correct usage of square brackets
$array = ['key1' => ['key2' => 'value']];
echo $array['key1']['key2']; // This will work

Keywords

quotation marks PHP multidimensional arrays syntax error key indexing

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