CODEWITHSUNDEEP
php
Nada Suliman
Nada Suliman

Reputation: 13

check php post value is numeric and well formatted

I need to check POST value is numeric and well formatted. My expected format is 

number.number
1.0
11.5

If POST value comes without .(DOT) only 1 then I would want that php convert that to 1.0

I tried this code but it doesn't work.

$foo = '2';
$foo = preg_match('/\\d{2}\\:\\d{2}\\.\\d{2}/', $foo);

Thanks :)

Upvotes: 1

Views: 4717

Answers (2)

romeo
romeo

Reputation: 68

Working code

//$value = '22';
$value = $_POST["input_value"];
if (is_numeric($value)) {

    $new_value = number_format($value, 1);

} else {

    $new_value = "$value is not numeric. <br>";

}

echo $new_value;

Upvotes: 1

Ofer Arial
Ofer Arial

Reputation: 1139

You basically want to check if the variable from the POST array is a float/double or not (float/double is a type of number in the format of x.x).

Cheking if a string is a float/double number

To do that, use this php built-in function: is_double or more accurate:is_float, that will tell you if the string is a float/double.

Checking if a string is an integer and converting it to a double/float value

If it's not a double, check if it's an integer (regular number): is_int, and if it's indeed an int, cast it to double by using number_format, look at the usage here: integer to double/float in php.

Example

$final_value;
$value = $_POST["wanted_value"];
if (is_float($value))
{
    $final_value = $value;
}
else if (is_int($value))
{
    $final_value = number_format($value, 1); // or 2 instead of 1 (2.0 or 2.00)
}
else
{
    $final_value = "ERROR";
}

Hope this helps!

Upvotes: 0

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