Let I have an array like this
Array
(
[126] => pitch
[134] => pithc2
[155] => pithc3
[87] => pithc4
[45] => pithc5
[192] => pithc6
)
Now is there any way to apply loop in this array from specific key?
Example: I want to output after 155 then output look like
1. pitch4,
2. pithc5
3. pithc6
if I want get output after 45 then output look like
1. pithc6
This should work for you:
Here I use reset(), next(), current(), key(), end() to loop through the array as you want it
<?php
$arr = array(126 => "pitch", 134 => "pithc2", 155 => "pithc3", 87 => "pithc4", 45 => "pithc5", 192 => "pithc6");
$from = 134;
//Get last element + rest the array
$end = end($arr);
reset($arr);
//set array pointer to '$from'
while(key($arr) != $from) next($arr);
while(current($arr) != $end) {
next($arr);
//prints the current array element and goes to the next one
echo current($arr) . "<br />";
}
?>
Output:
pithc3
pithc4
pithc5
pithc6
And if you want to limit how many elements should be printed you can use this:
<?php
$arr = array(126 => "pitch", 134 => "pithc2", 155 => "pithc3", 87 => "pithc4", 45 => "pithc5", 192 => "pithc6");
$from = 134;
$howmany = 6;
//Get last element + rest the array
$end = end($arr);
reset($arr);
//set array pointer to '$from'
while(key($arr) != $from) next($arr);
//go through '$howmany' times
for($i = 0; $i < $howmany; $i++) {
//prints the current array element and goes to the next one
echo current($arr) . "<br />";
//rest the array to the beginning, while it reached the end
if(current($arr) == $end)
reset($arr);
else
next($arr);
}
?>
Output:
pithc2
pithc3
pithc4
pithc5
pitch6
pithc
end, followed by prev might be better, if you know that the key from which the loop must start is known to exist. But that's micro-optimization anyways