休言女子非英物，夜夜龙泉壁上鸣。这篇文章主要讲述PHP手册Array数组大全(解析)相关的知识，希望能为你提供帮助。
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//array_change_key_case()
$age=[cyg=> "kkk","liwen"=> "70"];
print_r(array_change_key_case($age,CASE_UPPER)); //把键名转换成大写,默认是小写
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//array_chunk()
$cars=array("Volvo","BMW","Toyota","Honda","Mercedes","Opel");
print_r(array_chunk($cars,2)); //两个元素（2）组成一个数组.形成了一个二维数组啦
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//array_chunk()
$cars=array("Volvo","BMW","Toyota","Honda","Mercedes","Opel");
print_r(array_chunk($cars,2,true)); //两个元素组成一个数组，建名从0开始，递增
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//array_column()
// 表示由数据库返回的可能记录集的数组
$a = array(
array(
id => 5698,
first_name => Bill,
last_name => Gates,
),
array(
id => 4767,
first_name => Steve,
last_name => Jobs,
),
array(
id => 3809,
first_name => Mark,
last_name => Zuckerberg,
)
);
$last_names=array_column($a,last_name); //取出健名是last_name的值
print_r($last_names);
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//array_column()
// 表示由数据库返回的可能记录集的数组
$a = array(
array(
id => 5698,
first_name => Bill,
last_name => Gates,
),
array(
id => 4767,
first_name => Steve,
last_name => Jobs,
),
array(
id => 3809,
first_name => Mark,
last_name => Zuckerberg,
)
);
$last_names=array_column($a,last_name,id); //取出last_name的值，以该二维数组的id为其对应的下标
print_r($last_names);
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//array_combine()
$fname=array("Bill","Steve","Mark");
$age=array("60","56","31");
$c=array_combine($fname, $age);
print_r($c); //$fname作为下标，$gae作为值
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$a=array("A","Pat","Dog","d","Dog");
print_r(array_count_values($a));
//每个元素看后面有没有一样的，有就+1
//默认为1
?>
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$a1=array("a"=> "red","b"=> "green","c"=> "blue","d"=> "yellow");
$a2=array("e"=> "red","f"=> "green","g"=> "blue");
$result=array_diff($a1,$a2);
print_r($result); //返回两个数组中都没有的值
?>
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$a1=array("a"=> "red","b"=> "green66","c"=> "blue","d"=> "yellow");
$a2=array("a"=> "red","b"=> "green","c"=> "blue");
$result=array_diff_assoc($a1,$a2);
print_r($result); //比较两个数组里面的下标+值，如果不一样，就输出.
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$a1=array("a"=> "red","b"=> "green","c"=> "blue","d"=> "yellow");
$a2=array("a"=> "red","f"=> "green","g"=> "blue");
$a3=array("h"=> "red","b"=> "green","g"=> "blue");
$result=array_diff_assoc($a1,$a2,$a3);
print_r($result); //数组作比较,下标c和下标d都没有与其他数组的下标+值不一样，输出
?>
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$a1=array("a"=> "red","b"=> "green66","c"=> "blue","d"=> "yellow");
$a2=array("a"=> "red","b"=> "green","c"=> "blue");
$result=array_diff_key($a1,$a2);
print_r($result); //只比较建名
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$a1=array("a"=> "red","b"=> "green","c"=> "blue");
$a2=array("c"=> "yellow","d"=> "black","e"=> "brown");
$a3=array("f"=> "green","c"=> "purple","g"=> "red");
$result=array_diff_key($a1,$a2,$a3);
print_r($result); //比较健名。下标a没有对应的下标a，下标b没有对应的下标b，下标c有可以.
?>
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function myfunction($a,$b)
if ($a===$b)
return 0; //如果意义，返回0
return ($a> $b)?1:-1; //不相等，1或者-1的时候都会输出出来.
$a1=array("a"=> "red","b"=> "green","c"=> "blue");
$a2=array("d"=> "red","b"=> "green","e"=> "blue");
$result=array_diff_uassoc($a1,$a2,myfunction);
print_r($result); //以第一个数组对比其他数组。
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function myfunction($a,$b)
if ($a===$b)
return 0;
return ($a> $b)?1:-1;
$a1=array("a"=> "red","b"=> "green","c"=> "blue");
$a2=array("a"=> "red","b"=> "green","d"=> "blue");
$a3=array("e"=> "yellow","a"=> "red","d"=> "blue");
$result=array_diff_uassoc($a1,$a2,$a3,"myfunction");
print_r($result); //以第一个数组与其他数组作比较，c的下标+值其他数组没有一模一样的，就输出出来啦
?>
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function myfunction($a,$b)
if ($a===$b)
return 0;
return ($a> $b)?1:-1;
$a1=array("a"=> "red","b"=> "green","c"=> "blue");
$a2=array("a"=> "blue","b"=> "black","e"=> "blue");
$result=array_diff_ukey($a1,$a2,"myfunction");
print_r($result); //以第一个数组的为例子，第一个数组的那个下标在其他数组中没有一样的话，就输出出来
?>
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$a1=array_fill(3,4,"blue"); //下标都为blue
print_r($a1); //从下标3开始，输出四个值。+1的值
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$keys=array("a","b","c","d");
$a1=array_fill_keys($keys,"blue");
print_r($a1); //a b c d作为blue的下标，下标多少个输出多少个元素
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$a1=array("a"=> "red","b"=> "green","c"=> "blue","d"=> "yellow");
$result=array_flip($a1);
print_r($result); //交换数组中的某一个元素的jian值+jian名。比如a=> b变成了b=> a
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$a1=array("a"=> "red","b"=> "green","c"=> "blue","d"=> "yellow");
$a2=array("e"=> "red666","f"=> "green","g"=> "blue");
$result=array_intersect($a1,$a2);
print_r($result); //比较数组$a1与数组$a2相同的建值.如果相同的就输出出来(交集)
?>
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$a1=array("a"=> "red","b"=> "green","c"=> "blue","d"=> "yellow");
$a2=array("e"=> "red","f"=> "black","g"=> "purple");
$a3=array("a"=> "red","b"=> "black","h"=> "yellow");
$result=array_intersect($a1,$a2,$a3);
print_r($result); //以$a1为例，red相同的就输出出来a=> red(交集),因为是三个数组，所以必须三个相同的建名或者建值才行
?>
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$a1=array("a"=> "red","b"=> "green","c"=> "blue","d"=> "yellow");
$a2=array("6"=> "red","b"=> "green","c"=> "blue");
$result=array_intersect_assoc($a1,$a2);
print_r($result); //以$a1为基准，建名+建值一样才能输出出来
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$a1=array("a"=> "red","b"=> "green","c"=> "blue","d"=> "yellow");
$a2=array("a"=> "red","b"=> "green","g"=> "blue");
$a3=array("a"=> "red","b"=> "green","g"=> "blue");
$result=array_intersect_assoc($a1,$a2,$a3);
print_r($result); //因为是三个数组作比较，所以三个一样的建名+建值一样才能输出出来
?>
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$a1=array("a"=> "red","b"=> "green","c"=> "blue");
$a2=array("a"=> "red","c"=> "blu66","d"=> "pink");
$result=array_intersect_key($a1,$a2);
print_r($result); //以$a1为基准，建名相同的就输出出来
?>
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$a1=array("a"=> "red","b"=> "green","c"=> "blue");
$a2=array("c"=> "yellow","d"=> "black","e"=> "brown");
$a3=array("f"=> "green","c"=> "purple","g"=> "red");
$result=array_intersect_key($a1,$a2,$a3);
print_r($result); //以$a1为基准，三个一样的建名才能输出
?>
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$a=array("Volvo"=> "XC90","BMW"=> "X5");
echo array_key_exists("Volvo6",$a)?"存在":"不存在";
//判断数组中是否有这个健民
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$a=array("Volvo"=> "XC90","BMW"=> "X5","Toyota"=> "Highlander");
print_r(array_keys($a)); //返回数组中的所有健名
?>
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$a=array("Volvo"=> "XC90","BMW"=> "X5","Toyota"=> "Highlander");
print_r(array_keys($a,"Highlander")); //取出健值所对应的建名
?>
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$a=array(10,20,30,"10");
print_r(array_keys($a,"10",true));
?>
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$a=array(10,20,30,66,"10");
print_r(array_keys($a,"10",false)); //返回开始到"10"的范围
?>
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function mm($v)
return ($v*$v);
$a=array(1,2,3,4,5);
print_r(array_map("mm",$a));
//通过mm函数，返回新的数组
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$a1=array("Dog","Cat","cyg");
$a2=array("Puppy","Kitten","liwen");
print_r(array_map(null,$a1,$a2));
//两个数组通过array_map函数返回二维数组，第一个二维数组$a1[0],$a2[0].第一个二维数组$a1[1],$a2[1].以此类推
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$a1=array("Dog","Cat","cyg");
$a2=array("Puppy","Kitten","liwen");
print_r(array_merge($a1,$a2)); //把两个数组合并为一个数组。下标是从0开始，随着·元素的多少而递增
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$a1=array("a"=> "red","b"=> "green");
$a2=array("c"=> "blue","b"=> "yellow");
print_r(array_merge($a1,$a2)); //相同的下标都会后面的覆盖。合并两个数组
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$a=array(3=> "red",4=> "green");
print_r(array_merge($a)); //合并下标是从零开始的
?>
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$a1=array("a"=> "red","b"=> "green");
$a2=array("c"=> "blue","b"=> "yellow");
print_r(array_merge_recursive($a1,$a2)); //这个函数合并的如果有一样的下标会形成二维数组哦
?>
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$a=array("Dog","Cat","Horse","Bear","Zebra");
//$b=array_multisort($a); //返回1
array_multisort($a);
print_r($a); //开首字母进行排序
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$a1=array("Dog","Dog","Cat");
$a2=array("Pluto","Fido","Missy");
array_multisort($a1,SORT_ASC,$a2,SORT_DESC);
print_r($a1); //$a1进行升序排序，
print_r($a2); //$a2进行降序排序
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$a1=array(1,30,15,7,25);
$a2=array(4,30,20,41,66);
$num=array_merge($a1,$a2);
array_multisort($num,SORT_DESC,SORT_NUMERIC);
print_r($num); //合并两个数组，按数字进行降序排序
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$a=array("red","green");
print_r(array_pad($a,5,"blue")); //五个元素，不足的按照blue来填充
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$a=array("red","green");
print_r(array_pad($a,-5,"blue")); //五个元素，不足的按照blue来填充,-代表填充前面
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$a=array("red","green","blue");
array_pop($a);
print_r($a); //删除最后一个元素
?>
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$a=array(5,5);
echo(array_product($a)); //计算数组的乘积
?>
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$a=array("red","green");
array_push($a,"blue","yellow");
print_r($a); //往数组的尾部插入blue+yellow
?>
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$a=array("red","green","blue","yellow","brown"); //你刷新几次结果都会不一样哦
$b=array_rand($a,3);
echo $a[$b[0]]."";
echo $a[$b[1]]."";
echo $a[$b[2]]."";
//返回三个数组元素，刷新效果会不一样
【PHP手册Array数组大全(解析)】
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$a=array("a"=> "red","b"=> "green","c"=> "blue","d"=> "yellow"); //刷新几次效果都会不一样
print_r(array_rand($a,1)); //返回下标.每次刷新只返回一个元素的下标
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$a=array("a"=> "red","b"=> "green","c"=> "blue","d"=> "yellow");
print_r(array_rand($a,2)); //返回两个元素.下标是依次递增，从0开始
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function myfunction($v1,$v2)
return $v1 . "-" . $v2;
$a=array("Dog","Cat","Horse");
print_r(array_reduce($a, "myfunction",15));
//返回把数组转换成字符串
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$a1=array("red","green","blue","yellow");
$a2=array(0=> "orange",3=> "burgundy");
print_r(array_replace($a1,$a2)); //后面的覆盖前面的
?>
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$a1=array("a"=> array("red"),"b"=> array("green","blue"),);
$a2=array("a"=> array("yellow"),"b"=> array("black"));
print_r(array_replace_recursive($a1,$a2)); //相同关联下标的，会转换成二维数组，二维数组中，举个例子，yellow替换掉red。black替换掉green。效果如下
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$a1=array("a"=> array("red"),"b"=> array("green","blue"));
$a2=array("a"=> array("yellow"),"b"=> array("black"));
$a3=array("a"=> array("orange"),"b"=> array("burgundy"));
print_r(array_replace_recursive($a1,$a2,$a3)); //三个数组关联数组会转换成二维数组，相同下标的后面会覆盖前面的，比如orange覆盖red yellow
?>
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$a=array("a"=> "Volvo","b"=> "BMW","c"=> "Toyota");
print_r(array_reverse($a)); //倒序输出关联数组
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$a=array("Volvo","XC90",array("BMW","Toyota"));
$preserve=array_reverse($a,true);
print_r($preserve); //下标从高到底排序。
?>
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$a=array("a"=> "red","b"=> "green","c"=> "blue");
echo array_search("red",$a); //元素值的下标是啥？
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$a=array("a"=> "5","b"=> 5,"c"=> "5");
echo array_search(5,$a,true); //健值的下标是啥？
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$a=array("a"=> "red","b"=> "green","c"=> "blue");
echo array_shift($a); //删除掉第一个元素
print_r($a);
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$a=array("red","green","blue","yellow","brown");
print_r(array_slice($a,2)); //从第一个元素开始，删除两个元素
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$a=array("red","green","blue","yellow","brown");
print_r(array_slice($a,1,2)); //输出$a[1]+$a[2]这两个元素
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$a=array("red","green","blue","yellow","brown");
print_r(array_slice($a,-2,1)); //-2代表从后面往前数。-1==brown。yellow代表-2。1代表取出一个元素
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$a=array("red","green","blue","yellow","brown");
print_r(array_slice($a,1,2)); //从$a[1]开始取出两个元素
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$a=array("red","green","blue","yellow","brown");
print_r(array_slice($a,2,2,true)); //从$a[2]开始取出两个元素，true代表在原数组中是什么下标输出就是什么下标
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$a1=array("a"=> "red","b"=> "green","c"=> "blue","d"=> "yellow");
$a2=array("a"=> "purple","b"=> "orange");
array_splice($a1,0,3,$a2); //从0开始，删除三个元素
print_r($a1);
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$a1=array("0"=> "red","1"=> "green");
$a2=array("0"=> "purple","1"=> "orange");
array_splice($a1,1,0,$a2); //从1开始，删除0个元素.代表合并
print_r($a1);
?>
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$a=array("a"=> 52.2,"b"=> 13.7,"c"=> 0.9);
echo array_sum($a); //元素值相加
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function myfunction($a,$b)
if ($a===$b)
return 0; //0代表相等
return ($a> $b)?1:-1; //1或者-1都是输出的值
$a1=array("a"=> "black","b"=> "green","c"=> "blue");
$a2=array("a"=> "blue","b"=> "black","e"=> "blue");
$result=array_udiff($a1,$a2,"myfunction"); //只比较键值。两
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