Internally php uses strtol(), so it supports values in format `^\s*(valid_number)(any_other_char_sequence)?[kKmMgG]$`, where `valid_number` is valid octal or (hexa)decimal number (i.e. `0x[0-9a-f]+`, `0[0-7]*`, `[1-9][0-9]*`), and `any_other_char_sequence` is any other char sequence, which is ignored. So it actually supports setting ini values like `1testG`.