php数组的使用技巧PHP数组操作汇总.docxVIP

数组，可以说是PHP的数据应用中较重要的一种方式。PHP的数组函数众多，下面是我学习的小结，借此记之，便于以后鉴之。1. 数组定义数组的定义使用 array()方式定义，可以定义空数组：?ph$number = array(1,3,5,7,9)//定义空数组$result = array()$color =array(red,blue,green)//自定义键值$language = (1=English,3=Chinese,5=Franch)//定义二维数组$two = array(color=array(red,blue), //用逗号结尾week=array(Monday,Friday) //最后一句没有标点)；?2. 创建数组compact()compact()函数——将一个或多个变量（包含数组）转换为数组：array compact ( mixed $varname [, mixed $... ] )。?PHP$number = 1,3,5,7,9$string = Im PHPer$array = array(And,You?)$newArray = compact(number,string,array)rint_r ($newArray)?compact()函数用于将两个或多个变量转换为数组，当然也包含数组变量。其参数是变量的名称而非带有$全名。相反的函数是extract()作用顾名思义就是将数组转换为单个的字符串，键值作为其字符串名称，数组值作为字符串的值。运行结果:Array ([number] = 1,3,5,7,9[string] = Im PHPer[array] = Array ( [0] = And [1] = You? )array_combine()array_combine()——将两个数组重组成一个数组,一个作键值一个做的值：array array_combine ( array $keys , array $values )?PHP$number = array(1,3,5,7,9)$array = array(I,Am,A,PHP,er)$newArray = array_combine($number,$array)rint_r ($newArray)?array_combine函数不多说了，谁看了都明白。运行结果：Array ( [1] = I [3] = Am [5] = A [7] = PHP [9] = er )range()range()函数——创建指定范围的数组：?PHP$array1 = range(0,100,10);//0为起始值，100为结束值，10为步进值(默认步进值为1).rint_r($array1)echobr /$array2 = range(A,Z)rint_r($array2)echo br /$array3 = range(z,a)rint_r($array3)?array_fill()array_fill()函数——填充数组函数：?PHP$array = range(1,10)$fillarray = range(a,d)$arrayFilled = array_fill(0,5,$fillarray);//这里的$fillarray可以是字符串，如test.echo prerint_r ($arrayFilled)echo /pre$keys = array(string,2,9,SDK,PK)$array2 = array_fill_keys($keys,testing)echo prerint_r ($array2)echo /pre?运行结果：Array[0] = Array[0] = a[1] =[2] = c[3] = d[1] = Array[0] = a[1] =[2] = c[3] = d[2] = Array[0] = a[1] =[2] = c[3] = d[3] = Array[0] = a[1] =[2] = c[3] = d[4] = Array[0] = a[1] =[2] = c[3] = dArray[string] = testing[2] = testing[9] = testing[SDK] = testing[PK] = testing3. 数组的遍历foreach遍历foreach (array_expression as $value){}foreach (array_expression as $key = $value){}?PHP$speed = array(50,120,180,240,380)foreach($speed as $keys=$values){echo $keys.=.$val