What is the main issue the user is facing with PHP in this forum thread?

The main issue the user is facing with PHP in this forum thread is that they are trying to access an array element using a variable as the key, but it is not working as expected. To solve this issue, they need to use curly braces to access the array element dynamically. 

// Incorrect way of accessing array element with a variable as key
$variable = 'key';
$array = ['key' => 'value'];
echo $array[$variable]; // This will not work

// Correct way of accessing array element with a variable as key
$variable = 'key';
$array = ['key' => 'value'];
echo $array[${$variable}]; // This will work

Keywords

syntax error parse error missing semicolon unexpected token PHP code error

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