sort($data);  print_r($data);  ?> 输出结果如下所示: Array ([0] => 1 [1] => 2 [2] => 5 [3] => 7 [4] => 8 ) 也能使用rsort()函数进行排序,它的结果与前面所使用的sort()简单排序结果相反。Rsort()函数对数组元素进行从高到低的倒排,同样可以按数字大小排列也可以...
The letter "a" tells PHP that the array is an Associative one. (If you don't have the "a" before "sort", your key names will turn in to numbers!). The "a" also tells PHP to sort by the Value, and NOT by the key. In our script above, the surnames will be sorted. If you...
在PHP 中,数组(Array)是一种非常强大和灵活的数据结构,用于存储多个值。以下是 PHP 数组的核心概念: 基本概念 有序映射:PHP 数组实际上是一个有序映射,将键(key)映射到值(value) 多种类型:数组可以包含不同数据类型的值(字符串http://szbmf.jinpaizulin.cn整数、浮点数、布尔值,甚至其他数组) 动态大小:数...
array_unique($a1); // 删除数组中的重复值 array_values($a1); // 返回数组中所有的值。 array_keys($a1); // 返回数组中所有的键名。 array_flip($a1); // 反转数组 keyvalue交换 array_slice((array) $output, $start, $count); // 裁剪数组 /** * 数组排序 **/ function sortArrByField(...
<?php class Node{ public$index; public$data; public$left; public$right; public$parent; } class BinarySearchTree{ private$tree = null; //构造二叉查找树 //arrNodes= array(array($index, $value), array($index2, $value2)...) publicfunction generate($arrNodes){ if(empty($arrNodes)){ re...
ArrayObject::asort— Sort the entries by value 说明 public ArrayObject::asort ( void ) : void Sorts the entries such that the keys maintain their correlation with the entries they are associated with. This is used mainly when sorting associative arrays where the actual element order is ...
PHP提供了一些数组函数,如`array_search()`、`array_keys()`和`array_values()`等,可以根据当前数据的键值来获取上一条和下一条数据。例如: “`php $data = array( ‘key1’ => ‘value1’, ‘key2’ => ‘value2’, ‘key3’ => ‘value3’ // … 其他数据 ); $current_key = ‘key2’;...
If you use the array operator [ ] to assign variables to an array, PHP will use0,1,2, etc. as the keys. If you then sort the array using a function such asasort(), which keeps the keys intact, the array's keys will be out of order becauseasort()sorts by value, not by key....
2) Efficiency: By using arrays, you can optimise the storage and retrieval of data. Instead of creating separate variables for each value, you can store them in an array, reducing code duplication and enhancing efficiency. 3) Data manipulation: Arrays provide a wide range of functions and me...
orderrsort() - Sort array in descending numerical orderasort() - Sort array in ascending order, according to valueksort() - Sort array in ascending order, according to keyarsort() - Sort array in descending order, according to valuekrsort() - Sort array in descending order, according to ...