array ( 0 => 'index.php', 1 => 'PHP Manual', ), 'head' => array ( 0 => 'UTF-8', 1 => 'uk', ), 'this' => array ( 0 => 'function.is-int.php', 1 => 'is_int', 2 => 'Find whether the type of a variable is integer', ), 'up' => array ( 0 => 'ref.var.php', 1 => 'Variable handling Функції', ), 'prev' => array ( 0 => 'function.is-float.php', 1 => 'is_float', ), 'next' => array ( 0 => 'function.is-integer.php', 1 => 'is_integer', ), 'alternatives' => array ( ), 'source' => array ( 'lang' => 'en', 'path' => 'reference/var/functions/is-int.xml', ), 'history' => array ( ), ); $setup["toc"] = $TOC; $setup["toc_deprecated"] = $TOC_DEPRECATED; $setup["parents"] = $PARENTS; manual_setup($setup); contributors($setup); ?>
(PHP 4, PHP 5, PHP 7, PHP 8)
is_int — Find whether the type of a variable is integer
Finds whether the type of the given variable is integer.
Зауваження:
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().
valueThe variable being evaluated.
Приклад #1 is_int() 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));
}
?>Поданий вище приклад виведе:
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)