php - Number with leading zeroes gets changed in JavaScript - Stack Overflow

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I am calling a javascript function from php using a print statement to print out html code, and I am passing in an integer. However, the value when it is passed in php is not matching the number that the javascript function receives, and I have no clue why.

Here is the php that calls the javascript function:

$upc = $items[$i]->GetUPC();
print "upc: " . $upc . "<br/>";

$delete = "<a href='#' onclick='removeFromCart(". $upc .")' ><img src='".$redx."' height='17' width='17' /></a>";

The print statement prints out the value: 0011110416605

And on the page, using view source, here is the tag for this:

<a href='#' onclick='removeFromCart(0011110416605)' >

Here is the javascript function that is being called:

function removeFromCart(itemID){
    var option = document.getElementById("select_cart");
    var selected = option.options[option.selectedIndex].value;

    alert(itemID);

    loadCart(itemID,selected,"","remove");
}

The alert box is printing out the number: 1226972549

I could understand if it was removing the leading 0's, but this number is pletely different. Does anyone know why this may be?

I am calling a javascript function from php using a print statement to print out html code, and I am passing in an integer. However, the value when it is passed in php is not matching the number that the javascript function receives, and I have no clue why.

Here is the php that calls the javascript function:

$upc = $items[$i]->GetUPC();
print "upc: " . $upc . "<br/>";

$delete = "<a href='#' onclick='removeFromCart(". $upc .")' ><img src='".$redx."' height='17' width='17' /></a>";

The print statement prints out the value: 0011110416605

And on the page, using view source, here is the tag for this:

<a href='#' onclick='removeFromCart(0011110416605)' >

Here is the javascript function that is being called:

function removeFromCart(itemID){
    var option = document.getElementById("select_cart");
    var selected = option.options[option.selectedIndex].value;

    alert(itemID);

    loadCart(itemID,selected,"","remove");
}

The alert box is printing out the number: 1226972549

I could understand if it was removing the leading 0's, but this number is pletely different. Does anyone know why this may be?

• javascript
• php
• html

Share Improve this question Follow edited Nov 21, 2013 at 17:53 Vivin Paliath 95.6k4242 gold badges230230 silver badges301301 bronze badges asked Nov 21, 2013 at 17:48 Jason247Jason247 1,02444 gold badges2020 silver badges3939 bronze badges 1

• 1 Put quotes around that. removeFromCart("0011110416605") – jszobody Commented Nov 21, 2013 at 17:49

Add a ment  | 

4 Answers 4

Sorted by: Reset to default 11

JavaScript thinks it is an octal value (because of the leading zero and the lack of digits greater than 7). The decimal value of octal 0011110416605 is 1226972549. Example:

> var value = 010; //10 in octal
> console.log(value);
> 8  //is 8 in decimal

Use a string instead:

removeFromCart("0011110416605")

Solve it by creating a hidden text called it 'tempcart' then assing value to it with HTML or PHP, it will keep the leading zeros intact as a text string. To make sure, convert it to string if you are passing it thru PHP

HTML:

<input type='hidden' id='tempcart' value='0011110416605'>

PHP:

$itemID = '0011110416605';
$itemID = strval( $itemID );
echo "<input type='hidden' id='tempcart' value=$itemID >";

SCRIPT:

function removeFromCart() {
var itemID = document.getElementById('tempcart').value;
alert(itemID);
//do whatever...
}

This is just sample programming, you need to fit it in your program. I guess Javascript can't pass due to convertion to octal value (because of the leading zero and the lack of digits greater than 7) as @Vivid mention before.

You can just call with including '' quotes

Like onchange="updateLineTotal{$id,'{$po101}')";

Just include it in quotes so it will consider it as string not an integer

I found this issue and I fixed it by using parseInt:

itemID = parseInt('0011110416605',10);

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