PHP二维数组怎么按某个字段排序?
数据排序有很多现成的函数,但是如果想对指定字段进行排序就没有内置函数了,下面我整理了一些相关的数组排序函数与大家一起交流学习学习。
先不说别的我们直接看二维数组按某个字段排序实例
代码如下 | 复制代码 |
/** * @author yebihai http://www.bKjia.c0m * @desc 按二维数组的某一个字段进行升降排序 * @data * $testData = array( array('price'=>19), array('price'=>121), array('price'=>115), array('price'=>113), array('price'=>112) ); */ class sortClass{ //升序 function sortArrayAsc($preData,$sortType='price'){ $sortData = array(); foreach ($preData as $key_i => $value_i){ $price_i = $value_i[$sortType]; $min_key = ''; $sort_total = count($sortData); foreach ($sortData as $key_j => $value_j){ if($price_i $min_key = $key_j+1; break; } } if(empty($min_key)){ array_push($sortData, $value_i); }else { $sortData1 = array_slice($sortData, 0,$min_key-1); array_push($sortData1, $value_i); if(($min_key-1) $sortData2 = array_slice($sortData, $min_key-1); foreach ($sortData2 as $value){ array_push($sortData1, $value); } } $sortData = $sortData1; } } return $sortData; } //降序 function sortArrayDesc($preData,$sortType='price'){ $sortData = array(); foreach ($preData as $key_i => $value_i){ $price_i = $value_i[$sortType]; $min_key = ''; $sort_total = count($sortData); foreach ($sortData as $key_j => $value_j){ if($price_i>$value_j[$sortType]){ $min_key = $key_j+1; break; } } if(empty($min_key)){ array_push($sortData, $value_i); }else { $sortData1 = array_slice($sortData, 0,$min_key-1); array_push($sortData1, $value_i); if(($min_key-1) $sortData2 = array_slice($sortData, $min_key-1); foreach ($sortData2 as $value){ array_push($sortData1, $value); } } $sortData = $sortData1; } } return $sortData; } } |
后面整理一些关于数组排序的函数
数据排序函数有
•sort() 函数用于对数组单元从低到高进行排序。
•rsort() 函数用于对数组单元从高到低进行排序。
•asort() 函数用于对数组单元从低到高进行排序并保持索引关系。
•arsort() 函数用于对数组单元从高到低进行排序并保持索引关系。
•ksort() 函数用于对数组单元按照键名从低到高进行排序。
•krsort() 函数用于对数组单元按照键名从高到低进行排序。
array_multisort() 函数对多个数组或多维数组进行排序

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