How i can valid number only without character by php regular expression

Question

如何通过php正则表达式只有没有字符的有效数字

Answer 1

if( filter_var("32", FILTER_VALIDATE_FLOAT) !== false) {
    echo "Valid number";
}

if( filter_var("ab", FILTER_VALIDATE_FLOAT) === false) {
    echo "Invalid Number";
}

http://php.net/manual/en/book.filter.php

http://www.php.net/manual/en/filter.filters.validate.php

Answer 2

if (!preg_match("/^([0-9]{1,6})$/", $variable) ¦¦ (is_numeric($variable) != 1))
{
echo ("This is not a valid entry");
} 

Answer 3

如果你只想允许零或正整数（没有符号），你可以使用ctype_digit（ ）

Answer 4

Why regex? Use is_numeric() function.