Expression types
In PHP/FI 2.0, this would display both of $a's indices. In PHP
3.0, it wouldn't display anything. The reason is that in PHP 2.0,
because the left argument's type was string, a string comparison
was made, and indeed
""
does not equal
"0"
, and the loop went through. In PHP 3.0, when a string is
compared with an integer, an integer comparison is made (the
string is converted to an integer). This results in comparing
atoi("")
which is
0
, and
variablelist
which is also
0
, and since
0==0
, the loop doesn't go through even once.