PHP Unconference Europe 2015

end

(PHP 4, PHP 5)

endPositionne le pointeur de tableau en fin de tableau

Description

mixed end ( array &$array )

end() déplace le pointeur interne du tableau array jusqu'au dernier élément et retourne sa valeur.

Liste de paramètres

array

Le tableau. Ce tableau est passé par référence car il sera modifié par la fonction. Cela signifie que vous devez passer une vraie variable et non une fonction retournant un tableau, car actuellement, seules les variables peuvent être passées par référence.

Valeurs de retour

Retourne la valeur du dernier élément ou FALSE si le tableau est vide.

Exemples

Exemple #1 Exemple avec end()

<?php

$fruits 
= array('apple''banana''cranberry');
echo 
end($fruits); // cranberry

?>

Voir aussi

  • current() - Retourne l'élément courant du tableau
  • each() - Retourne chaque paire clé/valeur d'un tableau
  • prev() - Recule le pointeur courant de tableau
  • reset() - Remet le pointeur interne de tableau au début
  • next() - Avance le pointeur interne d'un tableau

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User Contributed Notes 10 notes

up
16
Anonymous
12 years ago
If you need to get a reference on the first or last element of an array, use these functions because reset() and end() only return you a copy that you cannot dereference directly:

<?php
function first(&$array) {
if (!
is_array($array)) return &$array;
if (!
count($array)) return null;
reset($array);
return &
$array[key($array)];
}

function
last(&$array) {
if (!
is_array($array)) return &$array;
if (!
count($array)) return null;
end($array);
return &
$array[key($array)];
}
?>
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5
jorge at REMOVETHIS-2upmedia dot com
2 years ago
If all you want is the last item of the array without affecting the internal array pointer just do the following:

<?php

function endc( $array ) { return end( $array ); }

$items = array( 'one', 'two', 'three' );
$lastItem = endc( $items ); // three
$current = current( $items ); // one
?>

This works because the parameter to the function is being sent as a copy, not as a reference to the original variable.
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4
franz at develophp dot org
3 years ago
It's interesting to note that when creating an array with numeric keys in no particular order, end() will still only return the value that was the last one to be created. So, if you have something like this:

    <?php
    $a
= array();
   
$a[1] = 1;
   
$a[0] = 0;
    echo
end($a);
   
?>

This will print "0".
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1
jasper at jtey dot com
8 years ago
This function returns the value at the end of the array, but you may sometimes be interested in the key at the end of the array, particularly when working with non integer indexed arrays:

<?php
// Returns the key at the end of the array
function endKey($array){
end($array);
return
key($array);
}
?>

Usage example:
<?php
$a
= array("one" => "apple", "two" => "orange", "three" => "pear");
echo
endKey($a); // will output "three"
?>
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2
ken at expitrans dot com
9 years ago
Please note that from version 5.0.4 ==> 5.0.5 that this function now takes an array. This will possibly break some code for instance:

<?php

echo ">> ".end(array_keys(array('x' => 'y')))."\n";

?>

which will return "Fatal error: Only variables can be passed by reference" in version <= 5.0.4 but not in 5.0.5.

If you run into this problem with nested function calls, then an easy workaround is to assign the result from array_keys (or whatever function) to an intermediary variable:

<?php

$x
= array_keys(array('x' => 'y'));
echo
">> ".end($x)."\n";

?>
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0
ivijan dot stefan at gmail dot com
5 months ago
I found that the function end() is the best for finding extensions  on file name. This function cleans backslashes and takes the extension of a file.

<?php
private function extension($str){
   
$str=implode("",explode("\\",$str));
   
$str=explode(".",$str);
   
$str=strtolower(end($str));
     return
$str;
}

// EXAMPLE:
$file='name-Of_soMe.File.txt';
echo
extension($file); // txt
?>

Very simple.
up
0
Sam Yong - hellclanner at live dot com
5 years ago
Take note that end() does not recursively set your multiple dimension arrays' pointer to the end.

Take a look at the following:
<?php

// create the array for testing
$a = array();
$i = 0;
while(
$i++ < 3){
$a[] = array(dechex(crc32(mt_rand())),dechex(crc32('lol'.mt_rand())));
}

// show the array tree
echo '<pre>';var_dump($a);

// set the pointer of $a to the end
end($a);

// get the current element of $a
var_dump(current($a));
// get the current element of the current element of $a
var_dump(current(current($a)));

?>

You will notice that you probably get something like this:

array(3) {
  [0]=>
  array(2) {
    [0]=>
    string(8) "764d8d20"
    [1]=>
    string(8) "85ee186d"
  }
  [1]=>
  array(2) {
    [0]=>
    string(8) "c8c72466"
    [1]=>
    string(8) "a0fdccb2"
  }
  [2]=>
  array(2) {
    [0]=>
    string(8) "3463a31b"
    [1]=>
    string(8) "589f6b63"
  }
}

array(2) {
  [0]=>
  string(8) "3463a31b"
  [1]=>
  string(8) "589f6b63"
}

string(8) "3463a31b"

The array elements' pointer are still at the first one as current. So do take note.
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0
Anonymous
12 years ago
When adding an element to an array, it may be interesting to know with which key it was added. Just adding an element does not change the current position in the array, so calling key() won't return the correct key value; you must first position at end() of the array:

<?php
function array_add(&$array, $value) {
$array[] = $value; // add an element
end($array); // important!
return key($array);
}
?>
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-1
laurence at crazypillstudios dot com
4 years ago
this is a function to move items in an array up or down in the array. it is done by breaking the array into two separate arrays and then have a loop creates the final array adding the item we want to move when the counter is equal to the new position we established the array key, position and direction were passed via a query string

<?php
//parameters
//$array- the array you are modifying
//$keytomove - the key of the item you wish to move
//$pos - the current position of the item: used a count($array) function
//and then loop with incrementing integer to add the position to the up //or down button
//$dir - the direction you want to move it - "up"/"dn"

function change_pos($array, $keytomove, $pos, $dir){
   
//count the original number of rows
   
$count = count($array);
   
//set the integer we will use to place the moved item
   
if($dir=="up"){
        if(
$pos==1){
           
//if the item is already first and we try moving it up
            //we send it to the end of the array
           
$change = $count;
        }else{
           
//anywhere else it just moves back one closer to the start of the array
           
$change = $pos-1;
        }
    }
   
//do the same for the down button
   
if($dir=="dn"){
        if(
$pos==$count){
           
$change = 1;
        }else{
           
$change = $pos+1;
        }
    }       
   
//copy the element that you wish to move
   
$move = $array[$keytomove];   
   
//delete the original from the main array
   
unset($array[$keytomove]);   
   
//create an array of the names of the values we
    //are not moving
   
$preint = 1;
    foreach(
$array as $c){       
       
$notmoved["{$preint}"] = $c['name'];       
   
$preint++;
    }   
   
//loop through all the elements
   
$int = 1;
    while(
$int<=$count){   
       
//dynamically change the key of the unmoved item as we increment the counter
       
$notmovedkey = $notmoved["$int"];
       
//when the counter is equal to the position we want
        //to place the moved entry we pump it into a new array
       
if($int==$change){
           
$neworder["{$keytomove}"] = $move;
        }
       
//add all the other array items if the position number is not met and
        //resume adding them once the moved item is written
       
if($contkey!=""){
           
$neworder["{$notmovedkey}"] = $array["{$notmovedkey}"];           
        }
   
$int++;
    }
   
    return(
$neworder);
}
?>

This is not too elegant but it works.
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-2
Jason
1 year ago
$filename = 'somefile.jpg';

php v5.4 does not support the following statement.
echo end(explode(".", $filename)); // return jpg string

instead you have to split into 2 statements
$file = explode(".", $filename);
echo end ($file);
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