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<?php var_dump(ctype_digit(1)); var_dump(ctype_digit("1")); var_dump(ctype_digit(255)); var_dump(ctype_digit("255")); var_dump(ctype_digit(256));
Output for 4.3.10 - 4.4.9, 5.0.3 - 7.1.7
bool(false) bool(true) bool(false) bool(true) bool(true)
Output for 4.3.0 - 4.3.9, 5.0.0 - 5.0.2
bool(false) bool(true) bool(false) bool(true) bool(false)