Php/func array reset

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PHP reset()函数

❮PHP数组参考

输出数组中当前和下一个元素的值,然后将数组的内部指针重置为数组中的第一个元素:

<?php

$people = array("Peter", "Joe", "Glenn", "Cleveland");



echo current($people) . "<br>";

echo next($people) . "<br>";



echo reset($people);

?>

定义和用法

reset()函数将内部指针移动到数组的第一个元素。

相关方法:

  • 当前() -返回数组中当前元素的值
  • 结束() -将内部指针移至数组的最后一个元素并输出
  • 下一个() -将内部指针移至数组中的下一个元素并输出
  • prev() -将内部指针移动到数组中的前一个元素并输出
  • 每() -返回当前元素的键和值,并向前移动内部指针

句法

reset(array)

参数值

参数 描述
array 需要。指定要使用的数组

技术细节

返回值: 成功返回数组中第一个元素的值;如果数组为空,则返回FALSE
PHP版本: 4+

更多例子

所有相关方法的演示:

<?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
?>

❮PHP数组参考