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Home Backend Development PHP Tutorial PHP对等循环,在线等,在加100分

PHP对等循环,在线等,在加100分

Jun 23, 2016 pm 01:44 PM

csdn 无法上传图片,数据表结构图片看百度知道吧
http://zhidao.baidu.com/question/1047510947746416459.html
这是我的数据表结构,PHP+MYSQL 。我想实现出循环这样的效果

尺码   颜色    图案

36      红色   印花

36      红色   平板

36      白色   印花

36      白色   平板

36      黑色   印花

36      白色   平板

37      红色   印花

37      红色   平板

依次类推, 但是尺码、颜色、图案 并不是固定的,有可能 只有两个  如

尺码  颜色

36     红色

36     白色

36     黑色

37     红色

37     白色

。。。。。。 等 

也有可能有4个  如 尺码 、颜色、图案、其它

这样用表格的格式循环 要怎么循环啊。。。我现在用FOR可以循环出来,但是只能是固定的,不能自由选择。


回复讨论(解决方案)

你的尺码  、颜色、图案 的值都是在一个字段里的吗?用什么分隔的?数据类型是什么?

看看这个测试例,你应该会知道怎么做了

create temporary table a (`尺码` varchar(10)) charset gbk;insert into a values (36),(37);create temporary table b (`颜色` varchar(10)) charset gbk;insert into b values ('红'),('白'),('蓝'),('黑');create temporary table c (`图案` varchar(10)) charset gbk;insert into c values ('印花'),('平板');select * from a,b,c;
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尺码 颜色 图案 36   红  印花 37   红  印花 36   红  平板 37   红  平板 36   白  印花 37   白  印花 36   白  平板 37   白  平板 36   蓝  印花 37   蓝  印花 36   蓝  平板 37   蓝  平板 36   黑  印花 37   黑  印花 36   黑  平板 37   黑  平板 
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针对每个产品,首先把有的列出来。
例如尺码、颜色、图案 则会有3个数组, size,color,pattern。
例如尺码、颜色则只有两个数组。

然后循环。

你的尺码 、颜色、图案 的值都是在一个字段里的吗?用什么分隔的?数据类型是什么?


尺码 颜色 图案 分别在三条记录里。比如 尺码的所有值都在一个字段里 用 \n 分开的

针对每个产品,首先把有的列出来。
例如尺码、颜色、图案 则会有3个数组, size,color,pattern。
例如尺码、颜色则只有两个数组。

然后循环。



现在可以分为三个数组了,但是我就是不会循环啊

$ar = array(  array( "A",  "B",  "C"),  array("1",  "2",  "3", "4"),  array("X",  "Y",  "Z"),);print_rDescartes($ar));function Descartes($d) {  $r = array_pop($d);  while($d) {    $t = array();    $s = array_pop($d);    if(! is_array($s)) $s = array($s);    foreach($s as $x) {      foreach($r as $y) $t[] = array_merge(array($x), is_array($y) ? $y : array($y));    }    $r = $t;  }  return $r;}
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$ar = array(  array( "A",  "B",  "C"),  array("1",  "2",  "3", "4"),  array("X",  "Y",  "Z"),);print_rDescartes($ar));function Descartes($d) {  $r = array_pop($d);  while($d) {    $t = array();    $s = array_pop($d);    if(! is_array($s)) $s = array($s);    foreach($s as $x) {      foreach($r as $y) $t[] = array_merge(array($x), is_array($y) ? $y : array($y));    }    $r = $t;  }  return $r;}
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分都给您了。谢谢您帮了我
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