is_int(3) [php man page]

IS_INT(3)								 1								 IS_INT(3)

is_int - Find whether the type of a variable is integer

SYNOPSIS

       bool is_int (mixed  $var)

DESCRIPTION

	Finds whether the type of the given variable is integer.

       Note

	       To test if a variable is a number or a numeric string (such as form input, which is always a string), you must use is_numeric(3).

PARAMETERS

	      o $var
		- The variable being evaluated.

RETURN VALUES

	Returns TRUE if $var is an integer, FALSE otherwise.

EXAMPLES

       Example #1

	      is_int(3) example

	      <?php
	      $values = array(23, "23", 23.5, "23.5", null, true, false);
	      foreach ($values as $value) {
		  echo "is_int(";
		  var_export($value);
		  echo ") = ";
		  var_dump(is_int($value));
	      }
	      ?>

	      The above example will output:

	      is_int(23) = bool(true)
	      is_int('23') = bool(false)
	      is_int(23.5) = bool(false)
	      is_int('23.5') = bool(false)
	      is_int(NULL) = bool(false)
	      is_int(true) = bool(false)
	      is_int(false) = bool(false)

SEE ALSO

       is_bool(3), is_float(3), is_numeric(3), is_string(3), is_array(3), is_object(3).

PHP Documentation Group 														 IS_INT(3)

IS_SCALAR(3)								 1							      IS_SCALAR(3)

is_scalar - Finds whether a variable is a scalar

SYNOPSIS

       bool is_scalar (mixed  $var)

DESCRIPTION

	Finds whether the given variable is a scalar.

	Scalar variables are those containing an integer, float, string or boolean. Types array, object and resource are not scalar.

       Note

	      is_scalar(3)  does  not  consider resource type values to be scalar as resources are abstract datatypes which are currently based on
	      integers. This implementation detail should not be relied upon, as it may change.

       Note

	      is_scalar(3) does not consider NULL to be scalar.

PARAMETERS

	      o $var
		- The variable being evaluated.

RETURN VALUES

	Returns TRUE if $var is a scalar, FALSE otherwise.

EXAMPLES

       Example #1

	      is_scalar(3) example

	      <?php
	      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($pi);
	      show_var($proteins)

	      ?>

	      The above example will output:

	      3.1416
	      array(3) {
		[0]=>
		string(10) "hemoglobin"
		[1]=>
		string(20) "cytochrome c oxidase"
		[2]=>
		string(10) "ferredoxin"
	      }

SEE ALSO

       is_float(3), is_int(3), is_numeric(3), is_real(3), is_string(3), is_bool(3), is_object(3), is_array(3).

PHP Documentation Group 													      IS_SCALAR(3)