php 循环添加数组元素

<?php
$array = array();
for ($i = 0; $i < 5; $i++) {
    $array[] = "Element " . ($i + 1);
}
print_r($array);
?>

<?php
$array = array();
$elements = array("Element 1", "Element 2", "Element 3", "Element 4", "Element 5");
foreach ($elements as $element) {
    $array[] = $element;
}
print_r($array);
?>

<?php
$array = array();
$maxIndex = 5;
for ($i = 0; $i < $maxIndex; $i++) {
    $array[] = "Element " . ($i + 1);
}
print_r($array);
?>

<?php
$array = array();
$elements = array("Element 1", "Element 2", "Element 3", "Element 4", "Element 5");
foreach ($elements as $element) {
    if (!in_array($element, $array)) {
        $array[] = $element;
    }
}
print_r($array);
?>