Unix and Linux Discussions Tagged with numeric |
|
Thread / Thread Starter |
Last Post |
Replies |
Views |
Forum |
|
|
|
3 |
2,064 |
UNIX for Beginners Questions & Answers |
|
|
|
7 |
2,066 |
Shell Programming and Scripting |
|
|
|
4 |
2,068 |
UNIX for Advanced & Expert Users |
|
|
|
4 |
2,845 |
Shell Programming and Scripting |
|
|
|
2 |
4,159 |
Shell Programming and Scripting |
|
|
|
2 |
9,659 |
Shell Programming and Scripting |
|
|
|
5 |
55,116 |
UNIX for Advanced & Expert Users |
|
|
|
3 |
4,179 |
Shell Programming and Scripting |
|
|
|
4 |
16,392 |
Shell Programming and Scripting |
|
|
|
2 |
4,158 |
Shell Programming and Scripting |
|
|
|
7 |
10,106 |
UNIX for Dummies Questions & Answers |
|
|
|
3 |
3,199 |
Shell Programming and Scripting |
|
|
|
1 |
2,542 |
Shell Programming and Scripting |
|
|
|
2 |
2,784 |
Shell Programming and Scripting |
|
|
|
7 |
4,765 |
Shell Programming and Scripting |
|
|
|
10 |
3,832 |
Shell Programming and Scripting |
|
|
|
5 |
13,975 |
Solaris |
|
|
|
3 |
6,718 |
Shell Programming and Scripting |
|
|
|
7 |
8,178 |
Shell Programming and Scripting |
|
|
|
3 |
7,366 |
Shell Programming and Scripting |
|
|
|
2 |
7,087 |
UNIX for Dummies Questions & Answers |
|
|
|
2 |
12,550 |
UNIX for Dummies Questions & Answers |
|
|
|
1 |
4,955 |
UNIX for Dummies Questions & Answers |
|
|
|
4 |
5,597 |
UNIX for Dummies Questions & Answers |
|
|
|
1 |
3,699 |
UNIX for Dummies Questions & Answers |
|
|
|
2 |
4,996 |
UNIX for Dummies Questions & Answers |
IS_NUMERIC(3) 1 IS_NUMERIC(3)
is_numeric - Finds whether a variable is a number or a numeric string
SYNOPSIS
bool is_numeric (mixed $var)
DESCRIPTION
Finds whether the given variable is numeric. Numeric strings consist of optional sign, any number of digits, optional decimal part and
optional exponential part. Thus +0123.45e6 is a valid numeric value. Hexadecimal (e.g. 0xf4c3b00c), Binary (e.g. 0b10100111001), Octal
(e.g. 0777) notation is allowed too but only without sign, decimal and exponential part.
PARAMETERS
o $var
- The variable being evaluated.
RETURN VALUES
Returns TRUE if $var is a number or a numeric string, FALSE otherwise.
EXAMPLES
Example #1
is_numeric(3) examples
<?php
$tests = array(
"42",
1337,
0x539,
02471,
0b10100111001,
1337e0,
"not numeric",
array(),
9.1
);
foreach ($tests as $element) {
if (is_numeric($element)) {
echo "'{$element}' is numeric", PHP_EOL;
} else {
echo "'{$element}' is NOT numeric", PHP_EOL;
}
}
?>
The above example will output:
SEE ALSO
ctype_digit(3), is_bool(3), is_null(3), is_float(3), is_int(3), is_string(3), is_object(3), is_array(3).
PHP Documentation Group IS_NUMERIC(3)