PHP Recursive redemption hierarchy tree presentation data

PHP recursive implementation of hierarchical tree-like presentation data

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 $arr [' id '], ' fid ' = $arr [' FID '], ' name ' and ' = ' $arr [' name '];} The data is arranged in a simple indentation as shown in Figure 1function Data2arr ($tree, $rootId = 0, $level = 0) {foreach ($tree as $leaf) {if ($leaf [' FID '] = = $rootId) {echo str_repeat (', $level). $leaf [' id ']. ' ' . $leaf [' name ']. '
'; foreach ($tree as $l) {if ($l [' fid '] = = $leaf [' id ']) {Data2arr ($tree, $leaf [' id '], $leve                    L + 1);                Break }}}}}data2arr ($data); Echo '
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';//The data according to the ownership of the package shown in Figure 2function Arr2tree ($tree, $rootId = 0) {$return = array (); foreach ($tree as $leaf) {if ($leaf [' fid '] = = $rootId) {foreach ($tree as $subleaf) {if ($                    subleaf[' fid '] = = $leaf [' id ']) {$leaf [' children '] = Arr2tree ($tree, $leaf [' id ']);                Break        }} $return [] = $leaf; }} return $return;} $tree = Arr2tree ($data);p rint_r ($tree); Echo '
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';//use HTML again to display the data as shown in Figure 3function tree2html ($tree) {echo '
 
 

  
  

    '; foreach ($tree as $leaf) {echo ' 
   
'. $leaf [' name ']; if (! empty ($leaf [' Children '])) tree2html ($leaf [' Children ']); Echo '
'; } Echo ' 
  
 
 
';} Tree2html ($tree);

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Figure 1:

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