Check if a variable is a number or a numeric string in PHP
Description
The following code shows how to check if a variable is a number or a numeric string.
Example
<?php/*from w w w . j a va 2s .com*/
$tests = array(
"42",
1337,
0x539,
02471,
0b10100111001,
1337e0,
"not numeric",
array(),
9.1
);
foreach ($tests as $element) {
if (is_numeric($element)) {
echo "'{$element}' is numeric", PHP_EOL;
} else {
echo "'{$element}' is NOT numeric", PHP_EOL;
}
}
?>
The code above generates the following result.
