<?php/** * 1、写函数创建长度为10的数组。数组中的元素为递增的奇数。首项为1。 */$ary = range(1, 10);//Array ( [0] => 1 [1] => 2 [2] => 3 [3] => 4 [4] => 5 [5] => 6 [6] => 7 [7] => 8 [8] => 9 [9] => 10 ) print_r($ary);/** * 2、创建长度为10的数组，数组中的元素为递增的等比数，比值为3。首项为1 */function myfun($n){	return pow(3, $n-1);}$ary = range(1, 10);$result = array_map(‘myfun‘,$ary);echo ‘<br>‘;//Array ( [0] => 1 [1] => 3 [2] => 9 [3] => 27 [4] => 81 [5] => 243 [6] => 729 [7] => 2187 [8] => 6561 [9] => 19683 ) print_r($result);/** * 3、求数组中最大数所在的下标； * $arr = array(1,5,67,8,4,3,45,6,887,2); */$arr = array(1,5,67,8,4,3,45,6,887,2);$max = $arr[0];//假设第一个数是最大的$index = 0;//记录最大数的key值，即下标foreach ($arr AS $key=>$val) {	if ($max < $val) {		$max = $val;		$index = $key;	}}//最大数是：887，其下标是：8echo ‘<br>最大数是：‘.$max . ‘，其下标是：‘ . $index;/* $mval = max($arr);echo ‘<br>‘;print_r(array_search($mval, $arr)); *//** * 4、创建一个长度为10的数组，数组中的元素满足斐波拉齐数列的规律； */$arr = array(1,1);for ($i=2; $i<10; $i++) {	$arr[] = $arr[$i-1]+$arr[$i-2];}echo ‘<br>‘;//Array ( [0] => 1 [1] => 1 [2] => 2 [3] => 3 [4] => 5 [5] => 8 [6] => 13 [7] => 21 [8] => 34 [9] => 55 ) print_r($arr);/** * 5、计算数组中最大数和最小数的差； */$arr = array(1,5,67,8,4,3,45,6,887,2);/*系统函数简单实现 * $minv = min($arr);$maxv = max($arr);echo ‘<br>‘;echo ‘最大数是：‘ . $maxv .‘,最小数是：‘.$minv.‘，差是：‘.($maxv-$minv); *//*不使用系统函数实现*/$max = $arr[0];//假设第一个数是最大的$min = $arr[0];//假设第一个数也是最小的foreach ($arr AS $key=>$val) {	if ($max < $val) {		$max = $val;	} elseif ($min > $val) {		$min = $val;	}}echo ‘<br>‘;//最大数是：887,最小数是：1，差是：886echo ‘最大数是：‘ . $max .‘,最小数是：‘.$min.‘，差是：‘.($max-$min);/** * 6、写一个方法，将一个长度超过10的数组最后5项直接截取，不改变顺序直接变为前5项， * 如{1,2,3,4,5,6,7,8,9,10,11,12}在经过方法后变为：{8,9,10,11,12,1,2,3,4,5,6,7} */function arrayHandel(&$ary, $count = 5) {	if (!(is_array($ary) && count($ary)>10 && count($ary)>$count)) {		return false;	}	$len = count($ary);	while ($count>0) {		$i = $len-1;		$count--;		array_unshift($ary, $ary[$i]);		array_pop($ary);	}}$array = array(1,2,3,4,5,6,7,8,9,10,11,12,13);echo ‘<br>‘;arrayHandel($array);//Array ( [0] => 9 [1] => 10 [2] => 11 [3] => 12 [4] => 13 [5] => 1 [6] => 2 [7] => 3 [8] => 4 [9] => 5 [10] => 6 [11] => 7 [12] => 8 ) print_r($array);/** *  * 7、将两个数组连接成一个新数组； * array_combine($keys, $values) 一个作键，一个作值，但是两个数组个数必须一致，不然会返回false * array_merge($array1)  覆盖相同的键名 * array_merge_recursive($array1) 不覆盖相同键名，组成以键名组成的数组集合 *  */$arr1 = array(‘a‘=>123,‘b‘=>1234);$arr2 = array(‘os‘=>‘linux‘,‘db‘=>‘mysql‘,‘language‘=>‘php‘,‘server‘=>‘nginx‘,‘b‘=>1256);echo ‘<br>‘;//Array ( [a] => 123 [b] => 1234 [os] => linux [db] => mysql [language] => php [server] => nginx ) print_r($arr1+$arr2);//$arr1会覆盖$arr2中相同键值,运算是从右至左，所以左边的覆盖右边echo ‘<br>‘;//boolean falsevar_dump(array_combine($arr1,$arr2));//boolean falseecho ‘<br>‘;//Array ( [a] => 123 [b] => 1256 [os] => linux [db] => mysql [language] => php [server] => nginx ) print_r(array_merge($arr1,$arr2));//$arr1和$arr2中的相同的元素被后一个$arr2的覆盖echo ‘<br>‘;//Array ( [a] => 123 [b] => Array ( [0] => 1234 [1] => 1256 ) [os] => linux [db] => mysql [language] => php [server] => nginx )print_r(array_merge_recursive($arr1,$arr2));/** * 数组逆序（不能直接使用rsort函数，不能生成新数组）； */$ary = array(‘apple‘,‘juice‘,‘orange‘,‘85‘,‘0‘,‘app‘,‘1‘,‘2‘,‘5‘,‘z‘);/* rsort($ary);echo ‘<br>‘;print_r($ary); */for ($i=0;$i<count($ary);$i++){	for ($j=$i+1;$j<count($ary);$j++){		if($ary[$i]<$ary[$j]){			$temp = $ary[$i];			$ary[$i] = $ary[$j];			$ary[$j] = $temp;		}	}}echo ‘<br>‘;//Array ( [0] => z [1] => orange [2] => juice [3] => apple [4] => app [5] => 85 [6] => 5 [7] => 2 [8] => 1 [9] => 0 ) print_r($ary);
/** * 9、在长度为10的升序有序数组中插入一个数字，组成新数组，保证数组顺序（不能直接使用sort） */$arr = range(1, 40, 2);function insertAry($ary, $val) {	$endAry = array();	$len = count($ary);	$index = 0;	if ($ary[$len-1] < $val) {//若插入数比数组中任意数大		$ary[] = $val;		$endAry = $ary;		return $endAry; 	}	while ($index<$len) {				if ($ary[$index]>=$val){			$endAry[$index++] = $val;			for($i = $index;$i<$len+1;$i++){				$endAry[$i] = $ary[$i-1]; 			}			break;		} else {			$endAry[$index] = $ary[$index];		}		$index++;	}		return $endAry;}echo ‘<br>‘;//Array ( [0] => 1 [1] => 3 [2] => 5 [3] => 7 [4] => 9 [5] => 11 [6] => 13 [7] => 15 [8] => 17 [9] => 19 [10] => 21 [11] => 23 [12] => 25 //[13] => 27 [14] => 29 [15] => 31 [16] => 33 [17] => 35 [18] => 37 [19] => 39 [20] => 88 ) print_r(insertAry($arr,88));
/** * 10、将一个无序数组排列成升序数组；（冒泡排序） */$arr = array(888,-9,1,11,5,67,8,4,3,45,6,887,2);$len = count($arr);for ($i=0; $i<$len; $i++) {	for ($j=$len-1; $j>$i; $j--) {		if ($arr[$j]<$arr[$j-1]) {			$temp = $arr[$j];			$arr[$j] = $arr[$j-1];			$arr[$j-1] = $temp;		}	}}echo ‘<br>‘;//Array ( [0] => -9 [1] => 1 [2] => 2 [3] => 3 [4] => 4 [5] => 5 [6] => 6 [7] => 8 [8] => 11 [9] => 45 [10] => 67 [11] => 887 [12] => 888 )print_r($arr);/*********选择排序************/$arr = array(888,-9,1,11,5,67,8,4,3,45,6,887,2);for ($i=0; $i<$len; $i++) {	for ($j=$i+1; $j<$len; $j++) {		if ($arr[$j]<$arr[$i]) {			$temp = $arr[$j];			$arr[$j] = $arr[$i];			$arr[$i] = $temp;		}	}}echo ‘<br>‘;//Array ( [0] => -9 [1] => 1 [2] => 2 [3] => 3 [4] => 4 [5] => 5 [6] => 6 [7] => 8 [8] => 11 [9] => 45 [10] => 67 [11] => 887 [12] => 888 )print_r($arr);/** * 11、对有序数组进行洗牌操作；（不能直接使用shuffle函数） */$arr = range(1, 40, 2);echo ‘<br>‘;echo ‘<br>$arr打乱前：‘;//$arr打乱前：Array ( [0] => 1 [1] => 3 [2] => 5 [3] => 7 [4] => 9 [5] => 11 [6] => 13 [7] => 15 [8] => 17 [9] => 19 [10] => 21 [11] => 23 
//[12] => 25 [13] => 27 [14] => 29 [15] => 31 [16] => 33 [17] => 35 [18] => 37 [19] => 39 ) print_r($arr);function shuffleDemo($arr) {	$resultAry = array();	$len = count($arr);	while ($len>0) {		$index = rand(0, $len-1);		$resultAry[] = $arr[$index];		array_splice($arr, $index,1);		$len--;	}	return $resultAry;}echo ‘<br>‘;echo ‘<br>$arr打乱后：‘;//$arr打乱后：Array ( [0] => 3 [1] => 33 [2] => 11 [3] => 15 [4] => 5 [5] => 39 [6] => 1 [7] => 25 [8] => 35 [9] => 29 [10] => 13 [11] => 27 
//[12] => 23 [13] => 7 [14] => 37 [15] => 19 [16] => 9 [17] => 17 [18] => 31 [19] => 21 )print_r(shuffleDemo($arr));
/** * 12、删除数组中指定位置的元素；(参考unset函数) */function deleteAryElement(&$arr, $index){	if (!(is_array($arr) && count($arr)>$index)) {		return false;	}	unset($arr[$index]);}$arr = array(888,-9,1,11,5,67,8,4,3,45,6,887,2);deleteAryElement($arr,2);echo ‘<br>‘;//Array ( [0] => 888 [1] => -9 [3] => 11 [4] => 5 [5] => 67 [6] => 8 [7] => 4 [8] => 3 [9] => 45 [10] => 6 [11] => 887 [12] => 2 ) print_r($arr);
/** * 13、将数组中素数删除组成新数组 */function filtFun($val) {//自定义过滤素数函数	$flag = true;//判断是否是素数	if (is_int($val)) {		if ($val<=0) {			$flag = false;		}		for ($i=$val-1;$i>1;$i--) {			if ($val%$i==0) {				$flag = false;				break;			}		}	} else {		$flag = false;	}	return !$flag;}$arr = array(888,-9,1,11,5,67,8,4,3,45,6,887,2,‘a‘);$rary = array_filter($arr, ‘filtFun‘);echo ‘<br>‘;//Array ( [0] => 888 [1] => -9 [6] => 8 [7] => 4 [9] => 45 [10] => 6 [13] => a )print_r($rary);
/** * 14、写函数检查数组中是否存在某个元素（不能直接使用in_array） */function exsitEle($arr, $value) {	if (!(is_array($arr) && count($arr)>0)) {		return false;	}	foreach ($arr AS $key=>$val) {		if ($val==$value) {			return true;		}	}	return false;}$arr = array(888,-9,1,11,5,67,8,4,3,45,6,887,2,‘a‘,array(‘a‘=>14,‘b‘=>48));//boolean truevar_dump(exsitEle($arr, array(‘a‘=>14,‘b‘=>48)));/** * 15、写函数，向数组最后追加一个元素（不能直接使用array_push） */$arr = array(888,-9,1,11,5,67,8,4,3,45,6,887,2,‘a‘,array(‘a‘=>14,‘b‘=>48));$arr[] = ‘abcd‘;echo ‘<br>‘;//Array ( [0] => 888 [1] => -9 [2] => 1 [3] => 11 [4] => 5 [5] => 67 [6] => 8 [7] => 4 [8] => 3 [9] => 45 [10] => 6 //[11] => 887 [12] => 2 [13] => a [14] => Array ( [a] => 14 [b] => 48 ) [15] => abcd )print_r($arr);/** * 16、写函数，求数组中所有元素之和（不能直接使用array_sum） */$arr = array(888,-9,1,11,5,67,8,4,3,45,6,-102);function countAry($arr) {	if (!(is_array($arr) && count($arr)>0)) {		return false;	}	$sum = 0;	foreach ($arr AS $key=>$val) {		$sum += $val;	}	return $sum;}echo ‘<br>‘;//927print_r(countAry($arr));