PHP Functions Essential Reference

is_long

bool is_long(mixed value) 

Tests whether a value is an integer.

Returns:

TRUE if the value is an integer; FALSE otherwise

Description:

is_long() checks whether value is an integer. If so, the function returns TRUE. If not, FALSE is returned.

Availability:

UNIX, Windows

Version:

3+, 4+

See also:

gettype() 

Example:

Test whether a value is an integer

$value = 29.5 + 0.5; // Note that even though $value contains 30 it is still not an integer. // This is because the value of 30 was created by adding two doubles // ...making the resulting value a double as well if (is_long ($value)) print 'Value $value is an integer.'; else print 'Value $value is not an integer.'; $value = 30; // Now $value contains an integer if (is_long ($value)) print ...