返回当前元素的键和值,并将内部指针向前移动:
<?php
$people = array("Peter", "Joe", "Glenn", "Cleveland");
print_r (each($people));
?>
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each() 函数返回当前元素的键和值,并将内部指针向前移动。
笔记:PHP 7.2 中已弃用each() 函数。
该元素键和值在具有四个元素的数组中返回。两个元素(1 和 Value)表示元素值,两个元素(0 和 Key)表示元素键。
相关方法:
each(
array)
Parameter | Description |
---|---|
array | Required. Specifies the array to use |
返回值: | 返回当前元素的键和值。该元素键和值在具有四个元素的数组中返回。两个元素(1 和 Value)表示元素值,两个元素(0 和 Key)表示元素键。如果没有更多的数组元素,该函数返回 FALSE |
---|---|
PHP 版本: | 4+ |
PHP 变更日志: | 自 PHP 7.2 起此函数已被弃用 |
与页面顶部的示例相同,但使用循环来输出整个数组:
<?php
$people = array("Peter", "Joe", "Glenn", "Cleveland");
reset($people);
while (list($key, $val) = each($people))
{
echo "$key => $val<br>";
}
?>
亲自试一试 »
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
?>
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