Retreiving an array value

[zzz]

I have an indexed array.

Say I can find out that my $myarray[4] == 123;

How do I retreve one value before and one value after, i.e:

$myarray[3] == ?;

$myarray[5] == ?;
 

[laserlight]

err... what do you mean? Your code snippet can do what you asked.

[zzz]

Dahh!!! Living up to my signature!

[zzz]

I guess my question should've been: if I know a value, like 123 how do I find out which $myarray[?] does it correspond to?

[laserlight]

Oh, by using [man]array_search/man

Yeah, your questions appear more complicated than they really are 🙂

[zzz]

Yeah, your questions appear more complicated than they really are

Welcome to my world...

:rolleyes:

[zzz]

So if I found out that

($myvar == $myarray[4])

can I say that my previous and next array values are:

$thisval = $myarray[4];
$prev = $thisval - 1;
$next = $thisval + 1;

PHP] 

????????????

 :D

[zzz]

So if I know my key, for example

$myarray[4])

how can I found what my previous and next array values are, eg.:

$thisval = $myarray[4];
$prev = $myarray[3];
$next = $myarray[5];
PHP]

[laserlight]

if (($key = array_search($needle, $haystack)) !== false) {
	$thisval = $haystack[$key];
	$prev = $haystack[$key - 1];
	$next = $haystack[$key + 1];
}

Of course, you may want to perform boundary checks to ensure that there is a legal $prev and $next value.