数组随机取值。解决方案

数组随机取值。

PHP code

$json = <<<EOT[{"album":"album1","truck":"truck1"},{"album":"album1","truck":"truck3"},{"album":"album1","truck":"truck4"},{"album":"album1","truck":"truck6"},{"album":"album2","truck":"truck2"},{"album":"album2","truck":"truck3"},{"album":"album3","truck":"truck2"},{"album":"album3","truck":"truck5"}{"album":"album4","truck":"truck5"},{"album":"album4","truck":"truck6"},{"album":"album5","truck":"truck1"},{"album":"album5","truck":"truck3"},{"album":"album6","truck":"truck2"},{"album":"album6","truck":"truck3"},{"album":"album6","truck":"truck4"},{"album":"album7","truck":"truck2"},{"album":"album7","truck":"truck5"},{"album":"album7","truck":"truck6"}]EOT;$data = json_decode($json);foreach($data as $row){   //echo '唱片:'.$row->album.' ,曲目:'.$row->truck.'<br />';}

有一个json格式的数组。储存唱片专辑及曲目。
如何随机取出4个唱片，每个唱片取出一首曲目，且这4首曲目名不重复？（album为唱片，truck为曲目。）

[解决办法]
我说错了，不是 array_rand 会出现重复项
而是他原始的数据有重复，需要做去重处理

PHP code

$data = json_decode($json);foreach($data as $v) $r[$v->truck] = $v;$data = $r;$ar = array_rand($data, 4);foreach($ar as $k) {    echo '唱片:'.$data[$k]->album.' ,曲目:'.$data[$k]->truck.'<br />';} 

 

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