is_scalar() returns true if the variable given by the var parameter is a scalar, otherwise it returns false.
Scalar variables are those containing an integer, float, string or boolean. For example:
function show_var($var) { if (is_scalar($var)) echo $var; else var_dump($var); } $pi = 3.1416; $proteins = array("hemoglobin", "cytochrome c oxidase", "ferredoxin"); show_var($pi); // prints: 3.1416 show_var($proteins) // prints: // array(3) { // [0]=> // string(10) "hemoglobin" // [1]=> // string(20) "cytochrome c oxidase" // [2]=> // string(10) "ferredoxin" // } |
Note: This function was added to the CVS code after the release of PHP 4.0.4pl1
See also is_bool(), is_double(), is_numeric(), is_float(), is_int(), is_real(), is_string(), is_object(), is_array(), and is_integer().