foreach中引用赋值的示例分析

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foreach中引用赋值

• 代码

$temp = [            [ 'id' => 1, 'name' => 'name1', 'age' => 'age1', 'time' => 'time1' ],            [ 'id' => 2, 'name' => 'name2', 'age' => 'age2', 'time' => 'time2' ]        ];# 清空原数据$data = $temp;foreach ($data as &$value){    $value = [];}echo '
';print_r($data);# 重置原数据$data = $temp;foreach ($data as &$value){    $value = [        'hobby' => 1    ];}print_r($data);# 追加原数据$data = $temp;foreach ($data as &$value){    $value['hobby'] = 1;}print_r($data);
打印
Array(    [0] => Array        (        )    [1] => Array        (        ))Array(    [0] => Array        (            [hobby] => 1        )    [1] => Array        (            [hobby] => 1        ))Array(    [0] => Array        (            [id] => 1            [name] => name1            [age] => age1            [time] => time1            [hobby] => 1        )    [1] => Array        (            [id] => 2            [name] => name2            [age] => age2            [time] => time2            [hobby] => 1        ))
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