ctype_digit

ctype_digit

Check for numeric character(s)

bool **ctype_digit** mixed $text

Checks if all of the characters in the provided , , are numerical. string``text

textThe tested string. note.ctype.parameter.integer note.ctype.parameter.non-string

Returns true if every character in the string is a decimal digit, false otherwise. ctype.result.empty-string text

Voorbeeld: A example

<?php
$strings = array('1820.20', '10002', 'wsl!12');
foreach ($strings as $testcase) {
    if (ctype_digit($testcase)) {
        echo "The string $testcase consists of all digits.\n";
    } else {
        echo "The string $testcase does not consist of all digits.\n";
    }
}
?>

The string 1820.20 does not consist of all digits.
The string 10002 consists of all digits.
The string wsl!12 does not consist of all digits.

Voorbeeld: A example comparing strings with integers

<?php

$numeric_string = '42';
$integer        = 42;

ctype_digit($numeric_string);  // true
ctype_digit($integer);         // false (ASCII 42 is the * character)

is_numeric($numeric_string);   // true
is_numeric($integer);          // true
?>

ctype_alnum``ctype_xdigit``is_numeric``is_int``is_string``IntlChar::isdigit