# randomly generated number

5 replies to this topic

### #1 ibanez270dx

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Posted 25 August 2006 - 04:53 PM

Hi,
Is there a way to create a randomly generated 11 digit number? I'd like to use it to create SKU numbers...

Thanks,
- Jeff

### #2 obsidian

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Posted 25 August 2006 - 05:08 PM

here are a couple options:
```<?php
// randomly generate and concatonate 11 digits
\$sku = '';
for (\$i = 0; \$i < 11; \$i++) {
\$num = rand(0,9);
\$sku .= \$num;
}
echo \$sku;

echo sprintf("%011d", rand(0,99999999999));
?>
```

hope this helps
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### #3 Iceman512

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Posted 26 August 2006 - 11:13 AM

Hi all,

I couldn't hope to match obsidian's post, but you could just try this:

```<?php
\$num = rand(11111111111,99999999999);
print \$num;
?>
```

Hope it helps!
Iceman

### #4 Barand

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Posted 26 August 2006 - 11:53 PM

However, as the max value of an integer is 2,147,483,647 (10 digits) I'd go with Obsidian's first method
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### #5 extrovertive

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Posted 27 August 2006 - 01:02 AM

However, as the max value of an integer is 2,147,483,647 (10 digits) I'd go with Obsidian's first method

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If the max size of an integer is 10 digits - the max value is 2,147,483,647? Can you tell me how you calculate that? Thanks.

### #6 AndyB

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Posted 27 August 2006 - 01:32 AM

The maximum value depends on the system. 32 bit systems have a maximum signed integer range of -2147483648 to 2147483647. [2^31-1]

Source: http://ca.php.net/intval
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