Here's a very common problem that everyone will run into. Let's say we want to make an array of arrays: Thus, when you access the array at position 0 and mutate it, you're mutating the same array ...
time ./path/to/php-src/sapi/cli/php < php-src-zend_hash-segv-fault Warning: Undefined variable $iC in Standard input code on line 4 Warning: Array to string ...