PHP中foreach()的用法

foreach (array_expression(数组名) as $key => $value)

statement

例：

$arr=array("1"=>"v1","2"="v2");
foreach($arr as $key=>$value) {
print($key."=>".$value." ");
}

该程序将出输出：1=>v1 2=>v2 

foreach (array_expression(数组名) as $value)

statement

例：

$arr=array("1"=>"v1","2"=>"v2");
foreach($arr as $value) {
print($value." ");
}

其结果会输出：v1 v2