Home >Backend Development >PHP Tutorial >Introduction to the difference between digital detection is_numeric and ctype_digit in PHP_PHP Tutorial
Introduction to the difference between digital detection is_numeric and ctype_digit in PHP_PHP Tutorial
- WBOYWBOYWBOYWBOYWBOYWBOYWBOYWBOYWBOYWBOYWBOYWBOYWBOriginal
- 2016-07-21 15:15:34960browse
is_numeric: Check whether it is a numeric string, it can be negative numbers and decimals
ctype_digit: Check whether the characters in the string are all numbers, negative numbers and decimals will fail the test
Note, the parameters must be certain If it is a string, if it is not a string, 0/FASLE will be returned
The following is a test example:
Copy code Code As follows:
$a = 0001111222;
var_dump($a);
var_dump(is_numeric($a)); //true
var_dump(ctype_digit($a) ); //true
$a = 0.1 ;
var_dump($a);
var_dump(is_numeric($a)); //true
var_dump(ctype_digit($a)); / /false
$a = -1 ;
var_dump($a);
var_dump(is_numeric($a)); //true
var_dump(ctype_digit($a)); //false
$a = a ;
var_dump($a);
var_dump(is_numeric($a)); //false
var_dump(ctype_digit($a)); //false
Statement：
The content of this article is voluntarily contributed by netizens, and the copyright belongs to the original author. This site does not assume corresponding legal responsibility. If you find any content suspected of plagiarism or infringement, please contact admin@php.cn
Previous article：Use PHP to implement the code of the previous and next articles_PHP tutorialNext article：Use PHP to implement the code of the previous and next articles_PHP tutorial