foreach 語句用於迴圈遍曆數組。
每進行一次迴圈，當前數組元素的值就會被賦值給 value 變數（數組指標會逐一地移動） - 以此類推。
文法
foreach (array as value)
{
code to be executed;
}
例子
下面的例子示範了一個迴圈，這個迴圈可以輸出給定數組的值：
<html>
<body><?php教程
$arr=array("one", "two", "three");foreach ($arr as $value)
{
echo "value: " . $value . "<br />";
}
?></body>
</html>
下面詳細看一下詳細說明
foreach ($array as &$row) {
$row = explode('/', $row);
}
foreach ($array as $row) {
//do something
}
這麼寫，在第二個迴圈會出邏輯錯誤，加入第二個迴圈中do something的地方是輸出$row，迴圈到最後一個的時候的輸出是倒數第二個元素，而不是最後一個
要這麼寫
複製代碼 代碼如下:
foreach ($array as &$row) {
$row = explode('/', $row);
}
unset($row);
foreach ($array as $row) {
//do something
}
或者第一個迴圈這麼寫
複製代碼 代碼如下:
foreach ($array as $key => $row) {
$array[$key] = explode('/', $row);
}
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