php integer?

Possible Answer:
Syntax. Integer s can be specified in decimal (base 10), hexadecimal (base 16), octal (base 8) or binary (base 2) notation, optionally preceded by a sign (- or +). - read more

Possible Answer:
Simon Neaves was close on explaining why his function is perfect choice for testing for an int (as possibly most people would need). He made some errors on his ctype_digit() output though - possibly a typo, or maybe a bug in his version of PHP at the time. - read more

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