php - $pId == 0 && $s ? eval("\$n = \"$s1\";") : eval("\$n = \"$s\";")

Question

$parentId == 0 && $str_group ? eval("$nstr = \"$str_group\";") : eval("$nstr = \"$str\";");

What does == in this line of code mean

Answer 1

Ternary operator, equivalent to

if($parentId == 0 && $str) {
    eval("$nstr = \"$str\";");
} else {
    eval("$nstr = \"$str\";");
}