PHP :: Decimal Field Validation

Mysql Field ALTER To Decimal(10,2)
I have a sql statement generated by phpmyadmin where i changed the field value of a table from "float" to "decimal(10,2)". here it is:

ALTER TABLE `BMG` CHANGE `I_PLQ` `I_PLQ` DECIMAL( 10, 2 ) DEFAULT Ɔ'

but i need it to also round the existing values up. for example: 2.4875 to 2.49
but for some reason it rounded it to 2.48, and i don't know how to change the statement so it will round values up for existing values in the field. is this even possible? if not, how would you handle it?

Returning Values From Decimal Or Integer Field
I have created a table with a column "Price" defined as Decimal(10,2). There are two records for articles with prices of 99.95 and 14.95. Within PHP I have the following lines: Code:

Form Field Validation
When validating user input I check it's not empty and then run 'mysql_real_escape_string($s)', I was then going to make sure that it is only alphanumeric, but I wanted to allow certain other characters as well. Realising this must be done before the mysql escape check, what characters should be blocked because they are dangerous, I can only really think of quotes and $. The real escape check should handle the quotes issue, so is the $ an issue or not?

Drop Down Field Validation
i am working on a page where office staff enters info on scheduling a doctor for on-call duty. the page has info like date, shift, Doctors name(Provider) and Location fields and a Add button.

staff selects the date from the calendar, selects a shift from the drop-down, selects a Provider and Location from the drop-down boxes.

When page loads, shift drop-down box defaults to the first value(Shift 1) and Provider and Location fields are defaulted to blank. These fields are to be made mandatory. i am trying what i did on othre screens and it doesnt seem to work here. if i hit the Add button without choosing values for these two fields(just leaving them blank) all validations are skipped. Code:

Form Text Field Validation
I've got a form and I'm now trying to validate the text fields in it. The field I want to validate is for someones name, so there should only contain letters. Below is the function I've written to handle this. Code:

Form Field *required* Validation
I have php form I'm trying to edit. Some of the fields on this form is required, and some aren't. I want to adjust it so none of the field is required. But I am not able to find the place to set this value.

Following are 2 piece of the code for 2 fields, 1 is required and 2nd is optional. Please help me determin where I might be able to adjust the validation. Code:

File Field Validation $_FILES??
I have the following code that validates my form fields. I have a file field called file that I cant figure out how to validate. Code:

How To Update Form Input Field Background Colour On Validation Error
I have been searching for form validation scripts for ages and all th ones that I like are far too complicated and inflexible so I decided to stick with my own which is easier to understand.

The only thing I don't like which i have seen on better form validation scripts is that and fields with errors are highlighted. i can only presume that they have used php to set the background color of the input field or textarea.

How would I add some code to change the background colour of form elements if an error is found? Here is my code which validates the form but doesn't change form elements colours. Code:

Get Rid Of The Decimal
is there a function that would get rid of the decimal.

like 1.14 becomes 1
2.6 becomes 2

not round. but just get rid of it.

Decimal
I try : print 1381.01 - 1381;

output: 0.00999999999999 (on linux OS)
0.0099999999999909 (on win98 OS)

Why is the difference?

Can A Field Communicate To A Server And Return Information To Another Field Without Retrieving The Whole Html Code Again?
I´ve got a sql table which has 3 fields.
Their relation to each other is like this example.

| CARS | YEAR | PRICE |
ford 2000
ford 2001
ford 2003
volkswagen 1999
volkswagen 2000

I am developing an ASP web page that modifies a specific registry.
So, it loads the information to some fields, but the user will be able
to change only the "PRICE" field.
I have to create two selects, one for "CARS" and other for "YEAR".
But the "YEAR" field will only contain the correspondent years for each
car the user selects. Example: selecting "ford" in the "CARS" <select>
box, only the years "2000", "2001", "2003" would be automatically
loaded in the "YEAR" <selec> box.
How could i implement it?

How Many ZEROS Are Behind The Decimal?
I am doing some tax calculations and I am getting 100.9945 and I want 100.99 what do I do to control how many ZEROS are behind the decimal?

Decimal Subtraction...
I'm try to test a variable sent from a form to see if its between .10 and $50 and make sure that it's not something like 1aaaa or a word. Here's what I have so far and it works fine on the > 50 part but I can't figure out why it doesn't work with a decimal. PHP Code:

Decimal Floats
I have these numbers in floats like this: 4.53 But when It ends up as 3.00, it displays only 3. How can I make it so that it adds 0's in empty decimal places?

Too Many Decimal Places
How can I find out how many decimal places are in a string? If there is more than one decimal place then I want to reject the input.

Decimal Places
I doing a calculation on a figure pulled from a mysql database: $mb = $bytes / 1048576
This will give me the answer I need in MB, However when I echo $mb the answer I get is 80.754311561584. How do knock off the trailing numbers to only give me 2 decimal places.

Adding Decimal Point
$var = 899;
echo $var;

and it of course echos 899

i need a way to turn it into 8.99 without changing the first statement because its being pulled from a mysql database that i dont control

so i need a way to add a decimal point before the last two numbers but not add zeros.

How To Split A Decimal Number?
I have a number that always have two decimals.

It can be anything from 1.11 to 9999999.99

I need to split so I get everything before dot and anything after dot in two values.

Like this when number is 2800700.66

$number = 2 800 700;
$decimal = 66;

Decimal Spaces Displayed...
Could someone please tell me how you can limit the number of decimal spaces shown when displaying a variable... i.e.

<?php

$Pie = 22 / 7;
echo("<p> $Pie </p>");
?>

I want to be able to print 3.14, not 3.14154534576.

Adding Numbers After Decimal
I am having trouble thinking of a function to add zeros after a decimal. Let say I have $money="10000" I need a function that will add .00 to 10000.00 and to add just a zero to 0 after 234.5

Getting Fraction From Decimal Number
This isn't necessarily a php-specific question, but I'm looking for a
formula to determine the fraction portion of a decimal number. For instance,
8.25. I could simply search the number (as a string) and return everything
from the right of the decimal point (.25). However is there a formula to do
this more eloquently?

Decimal Point Before The Last Two Digits
Im trying to add a decimal point before the last two digits of a numeric string using number_format, but it doesnt seem have the desired effect. I've tried using number_format($number,2), but this adds a decimal point to the end.

This is what I'm trying to achieve
1000 = 10.00
10000 = 100.00 and so on.

Format Value To 2 Decimal Places
when I output my double number which is a currency value, instead of getting £1.50 I am getting £1.5 Here is my code:

echo '<td width="25%">£'.$row->IPT.'</td></tr>';

My question is how do I format the output so that it appears as £1.50 ie. 2 decimal places.

1 Decimal Place Without Rounding
If I have a float number of say 3.478399 How can I reduce the number to 1 decimal place without rounding?

I've tried it will sprintf, but it rounds the 4 to a 5 which I want to avoid.

$float_number = 3.478399;
$new_float_number = sprintf ("%0.1f",$float_number);

Output returns 3.5 when really I need it to be 3.4

How To Format Decimal Input.
I have a table that has price as a field. I need the field formatted with 6 digits before and 2 digits after. How would my table creation look?

create table inventory(
Itemprice ?,
Name Char(20),
Primary Key (Name)
);

Decimal -> Float With Printf
I've tried to do this conversion but no luck until now.
Is it actually possible convert

from 0000000133400 to 13.3400
using printf ?

I would be very grateful if anyone out there could give me a hand with this one.

Round To The Hundreths In A Decimal?
Im trying to echo the result of a mathematical calculation and would like to round it to the hundredths. Heres what ive got... Code:

Specifying Number Of Decimal Places For Output
I'm outputting the result of a MySQL avg() (average) query. It is displayed to 4 decimal points (e.g. 47.3333). Can I change the number of decimal places shown? I would prefer the result to be outputted to 1 decimal place (e.g. 47.3).

Correctly Placing Decimal In Number
Does anyone know how to tell PHP to "count" over a certain number of spaces, and then place a decimal? For example, I have a variable $num, and I want to show $num with 2 decimal places. If $num = 13649 then PHP should print 136.49, and so on, for any number.

Trying To Convert String To Decimal Equivalent
I am trying to convert a string of any given length (can include special characters such as :,/,-,.,etc...) into its decimal equivalent. I've tried all of the php functions I can find, but they all seem to deal with hex or binary.

For example:
h == 104 (it is ok if the function adds the html enties on h)

(here is a table of the decimal equivalents http://www.neurophys.wisc.edu/www/comp/docs/ascii.html)

I've tried:
HexDec()
bin2hex()
BinDex()
etc....

Can anyone tell me how to convert this value?

Force 2 Decimal Places For Currency
How can I force a value to retain 2 decimal places (or atleast display them)? E.G. force $19.90 to be displayed as such, not $19.9

Variable Number Of Decimal Places
I need to variably format a number to either 2,3 or 4 decimal places depending on the number. For example:

Round to 2 digits if price=22.0000 or 22.3000, or 22.3300
Round to 3 digits if price=22.3330
Round to 4 digits if price=22.3333

In other words, I need to remove all trailing zeros from my price (decimal 9,4) up to the second decimal. I can easily round them all to 2 or 3 decimal places with round() or leave them in their natural state with 4 decimal places but 3 or 4 decimal places confuse people and are only necessary for maybe 0.5% of my items. BUT, when they are needed they are mandatory - e.g. o-rings selling for $0.0004 would appear to be free if rounded to 2 or 3 decimal places. I need some way to look at price and determine if decimals 4 and/or 3 are zero and, if one or both are, remove them.

Numbers Correct To 4 Decimal Places
how can I make all the numbers correct to 4 decimal places?

eg 0.01
=> 0.0100
eg 6.503
=>6.5030

and so on.....

Seprate Decimal And Integer Part
i have a problem that is relatively simple, but i can't seen to figure it out. is there any way in php to seprate the decimal and the integer. basically i want to seprate the integer and decimal part and use decimle part to another place.

Converting A Hexadecimal Value To An Equivaluent Decimal
I have to convert a hexa decimal value to a double value in php. I have converted hexadecimal to integer..using function base_convert(). But in this case it not giving me a good result..Examples:

9A99999999193A40 = 26.1 (Approx)
CDCCCCCCCC4C3CC0 = -28.3 (Approx)

In this the order may be from back to front. ie..403A19999999999A.

Can PHP Run Decimal Loop Step, Such As 0.1, Correctly?
I want to use the following code to print all value of alpha + beta _
gamme = 1;

But I miss some of the results. I suspect PHP cannot run decimal loop
correctly. I should get 66 groups.

$index = 0;

for ($alpha = 0.0; $alpha <= 1.0; $alpha += 0.1) {

for ($beta = 0.0; $beta <= 1.0; $beta += 0.1) { ...

Check If A Number Is Decimal Or Normal ?
How can i check if a number is decimal or normal ?

How To Update A Table's Field With Another Tables Field?
I need to take the state field from dt_profile table and update the dt_matchfinder with this state making sure the member_id field matches.

the problem is the dt_matchfinder table has null set for many of the state field but in the dt_profile each member ID has a specific state and I need the same to be true in the dt_matchfinder table.

Mathmatical Problems And Decimal Point Placement
I'm trying to get an expense report running and have ALMOST everything worked out. I can't seem to get my final 2 mileage totals to add properly and I'm also curious as to how I can restrict the number of decimal points. I would like to round the numbers up to the nearest 100th. Code:

Truncate A Decimal Pointed Figure Without Rounding ...
How can I get -0.162058 to -0.1 rather than rounding to -0.2?

I know I'm being stupid here, but it's really bugging me. The number before
the decimal point could 0 - 999

Select Both Field Name And Field Value- Mysql ?
What function to use to select both field name and field value from a mysql table ?

Replace Hex Number Or Decimal Number In A String ?
String may contain alphanumeric values. What is the bestway to replace a hex number such as 0x122aaa and decimal number such as 5678 with a string "blah" Example: I want to replace below--

wr_thru1 data or mask mismatch!! for addr=0x00000b73a0540 & mdfid:11
with
wr_thru1 data or mask mismatch!! for addr=hexVal & mdfid:decVal

Validation
What is the quickest or most efficient way to validate form elements, mainly e-mail addresses?

URL Validation
I'm trying to validate a url, but unfortunately it has some rather adverse effects on my page, basically makes the entire page disappear, without errors, notices or warnings. So far i've got this:

$churl = @fsockopen(server($image), 80, &$errno, &$errstr, 20);
if ($churl) {
echo "<img src=".$image." border=0>";
};

Basically it should make sure that the image (url in $image) exists, and then if it does it will echo it, but it just blanks the page. I tested it and removing the var line ($churl = etc.) makes the page appear...so there's something wrong with that line, i'm not sure what though.

Url Validation
i've just wrote this url validation. it works alright till i dont enter url-s like www.genie.co.uk or www.astalavista.box.sk lets say. the real problem is with the string that comes at the last place, i cant restrict it from being more than 3 chars because of the optional dot before it. once u have a look at the validation u'll see it. here it is:

ereg ("^(http://www|www)[.]([a-z,A-Z,0-9]+)([-,_])([a-z,A-Z,0-9]+)[.]([a-z,A-Z]){2,3}[.]?(([a-z,A-Z]){2,3})[/]?[~]?([/,a-z,A-Z,0-9]+)?$",$url);

URL Validation?
I have a form that will let the visitor submit pictures from somewhere in the internet. How can I verify that that URL exists or not?

PHP Validation
is there a function that will validate the input of a user from a form. Meaning I don't want people to input html tags or commas or anthing like that into the form fields. I ask just in case of the user has javascript disabled.

Key Validation
I've tried browsing the site for a tutorial to explain a way of using key validation, but i couldn't find any. I keep getting spam emails from the contact page! What I want to do is create a key validation - "type the characters you see in the image" - sort of thing. Now I have got really no ideas how to do this?

Decimal Field Validation

What is the best way to validate that the decimal field is filled with the properly data in a form? I have a field that ask the user to enter a price quote. I do not want letters or symbols allowed.