Questions about arrays in PHP

Array (size=3) 0 = = Array (size=3) 0 = = Array (size=3) ' welfarename ' = = String ' pack to eat ' ( length=9) ' welfareico ' = = String ' Url_1 ' (length=5) ' Xyid ' + int 1 1 = = Array (si          ze=3) ' welfarename ' + string ' First Class ' (length=9) ' welfareico ' = = String ' url_2 ' (length=5) ' Xyid ' + int 1 2 = array (size=3) ' Welfarename ' and string ' has car ' (length=6) ' Welfa Reico ' = = String ' Url_4 ' (length=5) ' Xyid ' + int 1 1 = array (size=2) 0 = array          (size=3) ' Welfarename ' + string ' First Class ' (length=9) ' welfareico ' = ' = String ' url_2 ' (length=5) ' Xyid ' = ' in T 2 1 = array (size=3) ' welfarename ' = = String ' buy buy buy ' (length=9) ' Welfareico ' + S Tring ' Url_3 ' (length=5) ' Xyid ' + int 2---------------------------------------------------------Array (size= 3) 0= = Array (size=11) ' Xyid ' + int 1 ' xylocation ' = = String ' Seoul ' (length=6) ' commentnum ' = i NT 3 ' visitornum ' = + int 1 1 = array (size=11) ' Xyid ' + int 2 ' xylocation ' = = String ' Tokyo ' (length=6) ' commentnum ' = = int 0 ' visitornum ' + int 1-------------------------------------------------- ------------------------------Array (size=3) 0 = = Array (size=11) ' Xyid ' + int 1 ' xylocation ' = = String ' Seoul ' (length=6) ' commentnum ' + int 3 ' visitornum ' = = int 1 ' welfare ' =>array (size=3) 0 = > Array (size=3) ' welfarename ' + string ' pack eat ' (length=9) ' welfareico ' = ' = String ' Url_1 ' (length=5) ' Xyid ' =&G T  int 1 1 = array (size=3) ' welfarename ' = = String ' First class ' (length=9) ' welfareico ' = = String ' url_2 ' (length=5) ' Xyid ' + int 1 2 = array (size=3) ' Welfarename ' and string ' has car ' (length=6) ' welfareico ' = = String ' Url_4 '  (length=5) ' Xyid ' =&Gt int 1 1 = array (size=11) ' Xyid ' + int 2 ' xylocation ' = String ' Tokyo ' (length=6) ' com Mentnum ' = = int 0 ' visitornum ' + int 1 ' welfare ' = = Array (size=2) 0 = = Array (size=3) ' Welfarename ' = = String ' First class ' (length=9) ' welfareico ' = ' + string ' url_2 ' (length=5) ' Xyid ' + int 2 1 = = Array (size=3) ' Welfarename ' = = String ' buy buy buy ' (length=9) ' welfareico ' = ' = String ' Url_3 ' (length=5) ' Xyid ' = int 2

Reply to discussion (solution)

Equivalent to the first array as a second array of a key corresponding to the value, how to implement the implementation of a third array ah

Find a solution, ~~~~~~.

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 $arr 1=array (Array (' welfarename ' = ' pack eat ', ' Welfa Reico ' = ' url_1 ', ' Xyid ' and ' 1 ', Array (' welfarename ' = ' First Class ', ' welfareico ' = ')          Url_2 ', ' Xyid ' =>1), array (' welfarename ' = ' have car ', ' welfareico ' = ' url_4 ',          ' Xyid ' =>1), array (' welfarename ' = ' First Class ', ' welfareico ' = ' url_2 ', ' Xyid ' =>2), array (' welfarename ' = ' buy buy buy ', ' welfareico ' = ' url_3 ', ' Xyid ' =& GT;2)); $arr 2=array (Array (' Xyid ' = 1, ' xylocation ' = ' Seoul ', ' commentnum ' =>3, ' Visitornu M ' =>1,), Array (' Xyid ' = 2, ' xylocation ' = ' Tokyo ', ' commentnum ' = + 0, ' visitornum ' = > 1,)), foreach ($arr 1 as $k = + $v) {$new [$v [0][' Xyid ']]= $v;} foreach ($arr 2 as $k = + $v) {$arr 2[$k] [' Welfare ']= $new [$v [' Xyid '];} 
 
  
 
  
  

  
   

  
 $arr 1=array (Array (' welfarename ' = ' pack eat ', ' Welfa Reico ' = ' url_1 ', ' Xyid ' and ' 1 ', Array (' welfarename ' = ' First Class ', ' welfareico ' = ')          Url_2 ', ' Xyid ' =>1), array (' welfarename ' = ' have car ', ' welfareico ' = ' url_4 ',          ' Xyid ' =>1), array (' welfarename ' = ' First Class ', ' welfareico ' = ' url_2 ', ' Xyid ' =>2), array (' welfarename ' = ' buy buy buy ', ' welfareico ' = ' url_3 ', ' Xyid ' =& GT;2)); $arr 2=array (Array (' Xyid ' = 1, ' xylocation ' = ' Seoul ', ' commentnum ' =>3, ' Visitornu M ' =>1,), Array (' Xyid ' = 2, ' xylocation ' = ' Tokyo ', ' commentnum ' = + 0, ' visitornum ' = > 1,)), foreach ($arr 1 as $k = + $v) {$new [$v [0][' Xyid ']]= $v;} foreach ($arr 2 as $k = + $v) {$arr 2[$k] [' Welfare ']= $new [$v [' Xyid '];} 
  
  
  
  
This solves, I don't understand the group deeply enough
  
 
  
More practice, more writing, it's deep.
 
  
  

  
More practice, more writing, it's deep.
  
  
Educated.
  
 
  
  

  
   

  
for ($i =0; $i
 
      
  
     
  
  
Moderator of this, can also be achieved, but there will be a lot more redundant arrays, the same thanks
  
     
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