so let's say i have an array:
$people[0] = "Bob";
$people[1] = "Sally";
$people[2] = "Charlie";
$people[3] = "Clare";
if (in_array("Charlie", $people)) {
//move Charlie to first item in array
}
What would be the most efficient way to get Charlie to the first item in the array?
You can use array_unshift() to prepend elements to an array.
$pos = array_search("Charlie", $people);
if($pos !== FALSE){
$item = $people[$pos];
unset($people[$pos]);
array_unshift($people, $item);
}
$people[0] = "Bob"; $people[1] = "Sally"; $people[2] = "Charlie"; $people[3] = "Clare";
$personToSearch = "Charlie";
$personIndex = array_search($personToSearch, $people);
if ($personIndex !== false)
{
unset($people[$personIndex]);
$people = array_merge(array($personToSearch), $people);
}
What would be the most efficient way to get Charlie to the first item in the array?
$people[0] = "Charlie";
$results = array_search('Charlie', $people);
if ($results !== FALSE) { then
$people[$results] = $people[0]; // swap the original 'first' person to where Charlie was.
$people[0] = 'Charlie';
}
Now, that assumes you don't care about preserving the rest of the array's original order. If you want to move Charlie to the front and shift everything in between up a slot, that's another matter entirely.
$position = array_search('Charlie', $people);
if ($position !== FALSE)
{
// Remove it
$charlie = array_splice($people, $position, $1);
// Stick it on the beginning
array_unshift($people, $charlie);
}
