What is the result of the expression: $a = '1'; $b = &$a; $b = '2'; echo $a;

Explanation

The expression `$b = &$a;` creates a reference, meaning both variables point to the same memory location. When `$b` is assigned the value '2', the value at that memory location changes. Consequently, `$a` also reflects this change, resulting in '2'.

Key points

References point to the same memory address
Changes to a reference affect the original variable
The & operator creates the reference link

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What is the result of the expression: $a = ‘1’; $b = &$a; $b = ‘2’; echo $a;