This is as simple as it gets, but I can't see why I'm getting 0 when I echo $num[3] from this PHP array.
$num=[00000004,00000002,00000005,00000009]; echo $num[3];
-
1Preceding the number with a 0 (zero) denotes an octal notation..Zhorov– Zhorov2021-02-11 12:56:37 +00:00Commented Feb 11, 2021 at 12:56
-
2This will throw a fatal error if you use PHP 7 or higher.Daan– Daan2021-02-11 12:57:02 +00:00Commented Feb 11, 2021 at 12:57
-
Thank you. I tried other numbers and I'm seeing an octal result. I never knew about that. I'll need to make them a string if I want the leading zeros in there.CheeseFlavored– CheeseFlavored2021-02-11 12:59:28 +00:00Commented Feb 11, 2021 at 12:59
Add a comment
|
4 Answers
Based on Integers Manual
To use octal notation, precede the number with a 0 (zero). To use hexadecimal notation precede the number with 0x. To use binary notation precede the number with 0b.
Your values are actually representing octal notation and that's why you are leading to issue.
Convert them to string:
$num=[
'00000004',
'00000002',
'00000005',
'00000009'
];
echo $num[3];
Output: https://3v4l.org/ktsJY
Note:- From Php7 onward it will give you Parse error: Invalid numeric literal
answered Feb 11, 2021 at 13:07
Death-is-the-real-truth
72.3k10 gold badges59 silver badges105 bronze badges
2 Comments
CheeseFlavored
@GertB AlivetoDie's answer mentioning "octal" was the real problem. So this is the best answer. It is acceptable to not use the quotes in php5, but the results were showing octal numbers.
Gert B.
True, it is the most complete answer. Adding the php7 note was a very good idea btw. I just think that its a lot of information for a simple mistake.
Because of the leading zero's, it needs to be a string, not a number:
$num=['00000004','00000002','00000005','00000009']; echo $num[3];
Comments
The data is not stored correct, they are stored as a number but they are strings so they need to be stored as a string. When I run your code it throws an error
Parse error: Invalid numeric literal in [...][...] on line 2
The code below wil return 00000009
$num=['00000004','00000002','00000005','00000009']; echo $num[3];
1 Comment
Gert B.
hmmz, looks like my answer... Only php 7+ will throw an error btw
Your syntax is not correct,try this
$num = array("00000004","00000002","00000005","00000009");
echo $num['3'];
3 Comments
Gert B.
Whats wrong with the syntax??? Your answer does exactly the same as my answer..
J.Ongoma
Thanks for explaining,the values are stored as string therefore you must enclose in quotation marks.
Gert B.
And why would you change the [...] to array(... ), thats not needed.