CODEWITHSUNDEEP
phpjson
fish man
fish man

Reputation: 2720

php json decode number issue

I met some trouble in php json decode number.

$json = '[{"num":123456789011121314},{"num":1516171819202122232425}]';
$number = json_decode($json);
foreach($number as $num){
    echo $num->num.'<br />';
    //echo (int)$num->num.'<br />';
}

this will get:

1.23456789011E+17
1.5161718192E+21

Also (int) do a wrong callback. And how to get the orignal number? Thanks.

I need 

123456789011121314    
1516171819202122232425

Upvotes: 2

Views: 1688

Answers (3)

gabriel14
gabriel14

Reputation: 147

Since the json structure is not complicated, we can fix it with a simple regular expression. The idea is to enclose numbers in doublequotes.

$json = '[{"num":123456789011121314},{"num":1516171819202122232425}]';
$sanitized = preg_replace('/:(\w*\d+)/', ':"$1"', $json);
$number = json_decode($sanitized);

This should work fine for you as did for me.

The pattern matches to a colon followed by some optional whitespace followed by a number.

Upvotes: 1

Code Magician
Code Magician

Reputation: 24032

If you're using PHP 5.4 or later, you can do this:

$number = json_decode($json, true, 512, JSON_BIGINT_AS_STRING);

Which will represent those large numbers as strings instead of ints. If you have access to the code generating the json, you could also encode the numbers as strings.

Upvotes: 4

Niet the Dark Absol
Niet the Dark Absol

Reputation: 324840

Use a 128-bit system?

That second number is bigger than even a 64-bit machine can hold as an integer, thus it is being converted to float. Cue precision loss and exponent parts.

Another solution: use smaller numbers.

If you absolutely must have these numbers, look into APIs like BC-Math or GMP.

Upvotes: 0

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