brk(3) - phpMan

brk (2)              - change data segment size
sbrk (2)             - change data segment size
strpbrk (3)          - search a string for any of a set of bytes
strpbrk (3p)         - scan a string for a byte
wcspbrk (3)          - search a wide-character string for any of a set of wid...
wcspbrk (3p)         - scan a wide-character string for a wide-character code