php end函数怎样用?
定义和用法
end() 函数将内部指针指向数组中的末了一个元素,并输出。
相干的要领:
current() - 返回数组中的当前元素的值。
next() - 将内部指针指向数组中的下一个元素,并输出。
prev() - 将内部指针指向数组中的上一个元素,并输出。
reset() - 将内部指针指向数组中的第一个元素,并输出。
each() - 返回当前元素的键名和键值,并将内部指针向前挪动。
语法
end(array)
参数
array 必须。划定要运用的数组。
返回值: 假如胜利则返回数组中末了一个元素的值,假如数组为空则返回 FALSE。
PHP 版本: 4+
实例 1
一切相干要领的演示:
<?php $people = array("Peter", "Joe", "Glenn", "Cleveland"); echo current($people) . "<br>"; // The current element is Peter echo next($people) . "<br>"; // The next element of Peter is Joe echo current($people) . "<br>"; // Now the current element is Joe echo prev($people) . "<br>"; // The previous element of Joe is Peter echo end($people) . "<br>"; // The last element is Cleveland echo prev($people) . "<br>"; // The previous element of Cleveland is Glenn echo current($people) . "<br>"; // Now the current element is Glenn echo reset($people) . "<br>"; // Moves the internal pointer to the first element of the array, which is Peter echo next($people) . "<br>"; // The next element of Peter is Joe print_r (each($people)); // Returns the key and value of the current element (now Joe), and moves the internal pointer forward ?>
输出:
Peter Joe Joe Peter Cleveland Glenn Glenn Peter Joe Array ( [1] => Joe [value] => Joe [0] => 1 [key] => 1 )
实例 2
输出数组中的当前元素和末了一个元素的值:
<?php $people = array("Peter", "Joe", "Glenn", "Cleveland"); echo current($people) . "<br>"; echo end($people); ?>
输出:
Peter Cleveland
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