Manipulacija podacima u nizovima (Manipulating data in arrays)

Ako zelite da obrisete duple elemente koristite funkciju array_unique().

Primer:

<?php

$cene_motora = array(3500, 3700, 2300, 3500, 3500);
print_r($cene_motora);

$cene = array_unique($cene_motora);
print_r($cene_motora);

?>

Rezultat:

Array ( [0] => 3500 [1] => 3700 [2] => 2300 [3] => 3500 [4] => 3500 ) Array ( [0] => 3500 [1] => 3700 [2] => 2300 )

Ako zelite da saberete sve vrednosti koje se nalaze u nizu, koristite funkciju array_sum().


Primer 2:

<?php

$cene_motora = array(3500, 3700, 2300, 3500, 3500);
echo "Prosecna cena = ", array_sum($cene_motora) / count($cene_motora);

?>

Rezultat:

Prosecna cena = 3300

Objasnjenje: pronasli smo srednju cenu motora. Cene motora se nalaze u nizu $cene_motora.

Funkcija array_flip() menja mesta kljucevima i vrednostima.

Primer 3:

<?php

$japan = array("motor1" => "honda", "motor2" => "suzuki",
 "motor3" => "kawasaki");

foreach ($japan as $kljuc => $vrednost) {
echo "Kljuc: $kljuc; Vrednost: $vrednost<br />";
}

echo "<br />";

$japan = array_flip($japan);

foreach ($japan as $kljuc => $vrednost) {
echo "Kljuc: $kljuc; Vrednost: $vrednost<br />";

}

?>

Rezultat:

Kljuc: motor1; Vrednost: honda
Kljuc: motor2; Vrednost: suzuki
Kljuc: motor3; Vrednost: kawasaki

Kljuc: honda; Vrednost: motor1
Kljuc: suzuki; Vrednost: motor2
Kljuc: kawasaki; Vrednost: motor3

If you want to delete duplicate items, you can use function array_unique().

Example:

<?php

$motorcycle_prices = array(3500, 3700, 2300, 3500, 3500);
print_r($motorcycle_prices);

$motorcycle_prices = array_unique($motorcycle_prices);

print_r($motorcycle_prices);

?>

Result:

Array ( [0] => 3500 [1] => 3700 [2] => 2300 [3] => 3500 [4] => 3500 ) Array ( [0] => 3500 [1] => 3700 [2] => 2300 )

If you want to sum up all the values that are in array, you can use function  array_sum().

Example 2:

<?php

$motorcycle_prices = array(3500, 3700, 2300, 3500, 3500);
echo "Average price = ", 

array_sum($motorcycle_prices) / count($motorcycle_prices);

?>

Result:

Average price = 3300

Explanation: we found the average price for motorcycles. Motorcycle prices are in array  $motorcycle_prices.

Function array_flip() changes the places of keys and values.

Example 3:

<?php

$japan = array("motorcycle1" => "honda", "motorcycle2" => "suzuki",
 "motorcycle3" => "kawasaki");

foreach ($japan as $key => $value) {
echo "Key: $key; Value: $value<br />";
}

echo "<br />";

$japan = array_flip($japan);

foreach ($japan as $key => $value) {
echo "Key: $key; Value: $value<br />";

}

?>

Result:

Key: motorcycle1; Value: honda
Key: motorcycle2; Value: suzuki
Key: motorcycle3; Value: kawasaki

Key: honda; Value: motorcycle1
Key: suzuki; Value: motorcycle2
Key: kawasaki; Value: motorcycle3