Question

我在这里的Oracle文章中有以下代码（它使用的是10g;我使用的是11gR2），

http://www.oracle.com/technetwork/articles/bollweg-easytrees-083408.html

效果很好。然后我将其改编为我的其他模式。仍然有效。

但是，我想把它作为JSON，嵌套就像它与标签一样。我尝试了各种各样的东西，但是无法得到它。我想让它变得像，

name:'employee'
children:[
   {
       name:'employee',
       children:[
          {
etc.

我试过了：

    if ($row['LEVEL']==$top_level)
                {
                    $name['children'][$node]['children'][$node]['children'][]=array('name'=>$_name . ' childLevel->' . $row['LEVEL'] .' rowNum->' . $row['ROWNUM']);
                }
                else
                {
                    $name['children'][$node]['children'][]=array('name'=>$_name . ' childLevel->' . $row['LEVEL'] .' rowNum->' . $row['ROWNUM']);
                }
later on json_encode($name);
...

但每次更深一层（如预期的那样）。我已尝试递归，我将之前的ID发送到新查询并避免下面的整个查询，但我不能正确地使用数组嵌套。我理解如何回显列表的HTML树（我理解代码中发生了什么，而不仅仅是复制和粘贴），而不是嵌套的JSON。

以下是Oracle文章的内容：

<?php 
    /*  file:           functional.php
        phpversion: 5.1.1
    version:        1.0
    author:     nick bollweg <nickD0TbollwegATgmailD0Tcom>
    purpose:        demonstrate basic CONNECT BY functionality with Oracle 10g
                using a functional approach. */
echo "<?xml version=\"1.0\" encoding=\"UTF-8\"?>\n"; ?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN"
    "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en">
<head>
     <title>CONNECT BY and array_map &raquo; a functional approach</title>
 </head>
 <body>
 <div>
<?php

// open a connection. change these values to fit your situation
$conn = oci_connect( "scott", "tiger", "//localhost/testdb" );
$results = array();
if( !$conn ) {
  exit;
}

//build a statement
$stmt = oci_parse( $conn, 
"   SELECT ENAME, JOB, EMPNO, MGR, LEVEL
         FROM EMP 
       CONNECT BY MGR = PRIOR EMPNO 
       START WITH MGR IS NULL
ORDER SIBLINGS BY ENAME");

// execute statement
oci_execute( $stmt );

// fetch the results
$nrows = oci_fetch_all ( $stmt, $results, 0, 0, 
              OCI_FETCHSTATEMENT_BY_ROW );

// we need this value accessible inside the formatting function
global $last;

// set a value not possible in a LEVEL column to allow the 
// first row to know it's "firstness"
$last = null;

// add a dummy "row" to cap off formatting
$results[] = array();
$formatted = array_map( "treeFunc", $results );

//output the results
echo implode( "\n",$formatted );

// clean up statement and connection
oci_free_statement( $stmt );
oci_close( $conn );

function treeFunc( $current ) {
    // the previous row's level, or null on the first row
    global $last;

    // structural elements
    $openItem =     '<li>';
    $closeItem =    '</li>';
    $openChildren = '<ul>';
    $closeChildren =    '</ul>';
    $structure = "";

    if( !isset( $current['LEVEL'] ) ) {
        // add closing structure(s) equal to the very last
        // row's level; this will only fire for the "dummy"
        return str_repeat( $closeItem.$closeChildren, 
            $last );
    }

    // add the item itself
    $item = "{$current['ENAME']} <i>{$current['JOB']}</i>";

    if( is_null( $last ) ) {
        // add the opening structure in the case of
        // the first row
        $structure .= $openChildren; 
    } elseif( $last < $current['LEVEL'] ){
        // add the structure to start new branches
        $structure .= $openChildren;
    } elseif( $last > $current['LEVEL'] ) {
        // add the structure to close branches equal to the 
        // difference between the previous and current levels
        $structure .= $closeItem.
               str_repeat( $closeChildren.$closeItem, 
                $last - $current['LEVEL'] );
    } else {
        $structure .= $closeItem;
    }

    // add the item structure
    $structure .= $openItem;

    // update $last so the next row knows whether this row is
    // really its parent
    $last = $current['LEVEL'];

    return $structure.$item;
}
?>
</div>
</body>
</html>

如何将SQL递归查询结果转换为JSON？

0 个答案: