PHP Functions Essential Reference

is_string

bool is_string(mixed value) 

Tests whether a value is a string.

Returns:

TRUE if the value is a string; FALSE otherwise

Description:

is_string() checks whether value is a string. 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 a string

// The quotes around the number force the value to be a string $value = '99'; if (is_string ($value)) print "Value \$value is a string."; else print "Value \$value is not a string.";