Как найти конец массива

    <?php

    $a = array();

    $a[1] = 1;

    $a[0] = 0;

    echo end($a);

    ?>



This will print "0".

<?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"
?>

<?phpfunction 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.

<?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)];

}

?>

<?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.

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);

<?phpecho ">> ".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";?>

<?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.

<?php

$a

= ['a' => ['hello' => 'a1','world' => 'a2'],
      'b' => ['hello' => 'b1','world' => 'b2'],
      'c' => ['hello' => 'c1','world' => 'c2']
    ];
$b = [];var_dump(end($a)['hello']);
var_dump(end($b)['hello']);
var_dump(false['hello']);?>

Results in:

string(2) "c1"
NULL
NULL

<?php

function array_add(&$array, $value) {

$array[] = $value; // add an element

end($array); // important!

return key($array);

}

?>

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.

echo $ext; // txt
?>

    // Get first item.
    foreach ($array as $item) {
        $first = $item;
        break;
    }
    // $first will have the first element.

$numbers = array('1','2','3','4');
        foreach ($numbers as $number){
            echo $number;
            if (end($numbers) != $number){
                echo ', ';
            }
        }