How can I detect the first and the last element inside a foreach loop?

Question

I want to detect the first and the last element inside a foreach loop:

$path = "monkey/cat/horse";

foreach(explode('/', $path) as $segment) {
   echo $segment;
}

My desired result is:

first:monkey
last:horse

This is how I tried to solve it:

$path = "monkey/cat/horse";
$explode = explode('/', $path);

foreach($explode as $segment) {
    if (current($explode) == $segment){
        echo "first:".$segment;
    } echo "<br>";
    if (end($explode) == $segment){
        echo "last:".$segment;
    }
}

But my result is:

first:horse
last:horse

Answer 1

No need of foreach loop, just use a foreach loop and count. the foreach loop return an array.

$path = "monkey/cat/horse";

$arr = explode("/", $path);
$count = count($arr);


foreach($arr as $key => $value){
    if($key == 0) echo "first:".$value;
    elseif($key == ($count - 1)) echo "last:".$value;
}

Result

first:monkey
last:horse

Answer 2

This works as fine.

$path = "monkey/cat/horse";
$explode = explode('/', $path);


echo "first:".current($explode);

echo "<br>";

echo "last:".end($explode);

WITH LOOP:

$path = "monkey/cat/horse";
$explode = explode('/', $path);
$cont = 0;

foreach($explode as $segment) {

    if ($cont == 0){

        echo "first:".$segment;
    } 

    echo "<br>";

    if ($cont > count($segment)){

        echo "last:".$segment;
    }

    $cont = $cont +1;
}

Answer 3

Get length of the array.

Get a counter and increment it over foreach.

In the loop:

1) if counter is 0, its first element.

2) If counter is array count minus one, its the last element.

<?php
$path = "monkey/cat/horse";
$explode = explode('/', $path);
$len = count($explode);
$i=0;
foreach($explode as $segment) {
 if ($i == 0) {
    echo "first: ".$segment;
    echo "<br/>";
 }
 if ($i == ($len-1)) {
    echo "last: ".$segment;
 }
 ++$i;
}
?>

Output:

first: monkey
last: horse

Live demo

Answer 4

your code has only a little problem, try to change the current function by reset function. Like this:

$path = "monkey/cat/horse";
$explode = explode('/', $path);
foreach($explode as $segment) {

    if (reset($explode) == $segment){
        echo "first: $segment";
    }

    echo "<br>";

    if (end($explode) == $segment){
        echo "last: $segment";
    }
}

Here you are the reference about "reset" function: http://php.net/manual/es/function.reset.php

Regards!