intval:
echo intval('1000000000000');
returns 2147483647.
Why?
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Robert Rocha
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3Because you can't store 1 trillion in 32 bits – Joel Jan 11 '14 at 18:35
3 Answers
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The size of an integer in PHP is platform-dependent. The documentation for intval() clearly explains this:
The maximum value depends on the system. 32 bit systems have a maximum signed integer range of -2147483648 to 2147483647. So for example on such a system, intval('1000000000000') will return 2147483647. The maximum signed integer value for 64 bit systems is 9223372036854775807.
Amal Murali
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From the same documentation you shared..
The maximum value depends on the system. 32 bit systems have a maximum signed integer range of -2147483648 to 2147483647. So for example on such a system, intval('1000000000000') will return 2147483647. The maximum signed integer value for 64 bit systems is 9223372036854775807.
echo intval('1000000000000');
returns 2147483647. Why?
is because the system you're trying is 32 bits system
zzlalani
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@MuhammadRashid the document says `The integer value of var on success, or 0 on failure. Empty arrays return 0, non-empty arrays return 1.` – zzlalani Jan 11 '14 at 18:49
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1@MuhammadRashid check the examples http://www.php.net/manual/en/function.intval.php#refsect1-function.intval-examples – zzlalani Jan 11 '14 at 18:50
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Because
1. You have 32 bit systems.
2. That's why you can operate a maximum signed integer range of -2147483648 to 2147483647`.
For this value there will be no problem if You had 64 bit systems Antother example:
On 32 bit systems
echo intval('420000000000000000000'); // 2147483647
On 64 bit systems
echo intval('420000000000000000000'); // 420000000000000000000
sergio
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