Understanding variable scopes in php

Question

echo \"Point1, a=\".$a.\"\\n\";
echo \"Point1, b=\".$b.\"\\n\";
if(1<2)
    {
        $a = 6; 
        $b[\'link\'] = \"here\";
        echo \"Point2, a=\".$a.\"\         


        

Answer 1

The first $a and $b would actually throw a warning, undefined index as they haven't been declared before being output.