php数组入门教程之数组遍历

以上是一些数组遍历的例子。

1，foreach遍历数组

<?php
//foreach遍历
foreach (array_expression as $value){}
foreach (array_expression as $key => $value){}
<?PHP
$speed = array(50,120,180,240,380);
foreach($speed as $keys=>$values){
echo $keys."=>".$values."<br />";
}
?>

运行结果：
0=>50
1=>120
2=>180
3=>240
4=>380

2，while循环遍历数组
while循环遍历一般结合list函数。

<?PHP
//while循环遍历
//by www.jb200.com
$staff = array(
array("姓名","性别","年龄"),
array("小张","男",24),
array("小王","女",25),
array("小李","男",23)
);
echo "<table border=2>";
while(list($keys,$value) = each($staff)){
list($name,$sex,$age) = $value;
echo "<tr><td>$name</td><td>$sex</td><td>$age</td></tr>";
}
echo "</table>";
?>

3，for循环遍历数组

<?PHP
$speed = range(0,220,20);
for($i =0;$i<count($speed);$i++) {
echo $speed[$i]." ";
} //by www.jb200.com
?>

运行结果：
0 20 40 60 80 100 120 140 160 180 200 220