您可以使用通用函数：
function _group_by($array, $key) { $return = array(); foreach($array as $val) { $return[$val[$key]][] = $val; } return $return;}我添加了一些示例代码进行测试
<?php$list= [[ 'No' => 101, 'Paper_id' => 'WE3P-1', 'Title' => "a1", 'Author' => 'ABC', 'Aff_list' => "University of South Florida, Tampa, United States", 'Abstracts' => "SLA"] ,[ 'No' => 101, 'Paper_id' => 'WE3P-1', 'Title' => "a2", 'Author' => 'DEF', 'Aff_list' => "University of South Florida, Tampa, United States", 'Abstracts' => "SLA"] ,[ 'No' => 104, 'Paper_id' => 'TUSA-3', 'Title' => "a3", 'Author' => 'GH1', 'Aff_list' => "University of Alcala, Alcala de Henares, Spain", 'Abstracts' => "Microwave"] ];print_r(_group_by($list, 'No'));
