[SOLVED] Array index out of bounds

[daq]

Couple of questions about arrays:

1. Does array value with index out of bounds always return NULL or is there a chance it will return garbage? I.e.:

$myArr ("one", "two");
echo "Value of " . $myArr[5];

 

2. I'm iterating through an array throughout a large chunk of code with a basic array[$c++]. What's the best way to monitor index without reinventing the wheel? I was hoping to be able to catch an out of bounds exception to reset the index ($c) to 0, but it doesn't throw one.

 

Thanks.

[soak]

Could you use foreach() instead? That way it will just loop the values in your array, no need to check for bounds.

[daq]

Could you use foreach() instead? That way it will just loop the values in your array, no need to check for bounds.

 

Array is not used in a loop, but in various places throughout the code. The code goes through approximately 4-7 $c increments during the run.

 

To clarify, loop does not iterate the array, but rather pulls incremental values from it when it needs them. I just need a way to reset the index when it goes out of bounds.

[wildteen88]

You could do

 

// increment c
$c++;

// now check if $c needs resetting
$c = (isset($arr[$c])) ? $c : 0;

[daq]

You could do

 

// increment c
$c++;

// now check if $c needs resetting
$c = (isset($arr[$c])) ? $c : 0;

 

The disadvantage of this way is that I will have to check before each use. With something like a try catch, I would only have to write code that handles out of bounds once.

But this is a great suggestions if nothing like try catch is available.

 

Even shorter:

$c = (isset($arr[$c])) ? $C++ : 0;

[daq]

I put the increment in the wrong place, it was supposed to be

$c = (isset(content[++$c])) ? $c : 0