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<?php var_dump(PHP_INT_MAX); var_dump(PHP_INT_SIZE); var_dump(hexdec('FFFFFFFF')); var_dump(hexdec('FFFFFFFFFFFFFFF')); var_dump(hexdec('755869c2d8ad8a0')); var_dump(hexdec('755869c2d8ad8a0a15e4337804c3dec6'));
Output for git.master, git.master_jit, rfc.property-hooks
int(9223372036854775807) int(8) int(4294967295) int(1152921504606846975) int(528476536622995616) float(1.559787427207167E+38)

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