[分享]PHP兑现树的递归展示

[分享]PHP实现树的递归展示
原文博客地址: http://blog.csdn.net/lgg201/article/details/7973971

用法:

PHP code

usage: php tree-display.php 

测试输出:

PHP code

$ php tree-display.php 3 name-00000001[1]┇    ┠ name-00000002[2]┇    ┇    ┠ name-00000003[3]┇    ┇    ┠ name-00000004[4]┇    ┇    ┗ name-00000005[5]┇    ┠ name-00000006[6]┇    ┇    ┠ name-00000007[7]┇    ┇    ┠ name-00000008[8]┇    ┇    ┗ name-00000009[9]┇    ┗ name-00000010[10]┇         ┠ name-00000011[11]┇         ┠ name-00000012[12]┇         ┗ name-00000013[13]┠ name-00000014[14]┇    ┠ name-00000015[15]┇    ┇    ┠ name-00000016[16]┇    ┇    ┠ name-00000017[17]┇    ┇    ┗ name-00000018[18]┇    ┠ name-00000019[19]┇    ┇    ┠ name-00000020[20]┇    ┇    ┠ name-00000021[21]┇    ┇    ┗ name-00000022[22]┇    ┗ name-00000023[23]┇         ┠ name-00000024[24]┇         ┠ name-00000025[25]┇         ┗ name-00000026[26]┗ name-00000027[27]     ┠ name-00000028[28]     ┇    ┠ name-00000029[29]     ┇    ┠ name-00000030[30]     ┇    ┗ name-00000031[31]     ┠ name-00000032[32]     ┇    ┠ name-00000033[33]     ┇    ┠ name-00000034[34]     ┇    ┗ name-00000035[35]     ┗ name-00000036[36]          ┠ name-00000037[37]          ┠ name-00000038[38]          ┗ name-00000039[39]resource usage[level: 3, node number: 39]:         clock time: 0.001967s        system cpu: 0.000169s          user cpu: 0.001013s      memory usage: 7208 byte

PHP code

 $id,         K_NAME    => sprintf(NAME_FMT, $id),         K_CHILD    => $is_leaf ? NULL : array(),     );}/** * tree_build  * 构造一棵树(树中每个节点的子节点数由MAX_NODES确定) * @param mixed $datas     要返回的树引用 * @param mixed $id     起始ID * @param mixed $level     树的层级 * @access public * @return void */function tree_build(&$datas, &$id, $level) {    if ( $level  0 ) {        $i    = 0;        /* 前缀格式: "父级连线" ["宽空白符" "父级连线" ...] "宽空白符" */        $string    .= ($is_last & 1  $data ) {        /* 当前节点及所有祖先是否尾节点标记 */        $tmp_is_last    = $is_last  0 )         $sum    += pow($s, $n --);    return $sum;}/* 计算ruage时间 */function ru_time($info, $type) {    return $info[$type . '.tv_sec'] + $info[$type . '.tv_usec'] / 1000000;}/* 输出资源使用情况 */function resource_usage($lv, $nodes, $cb, $ce, $mb, $me, $rb, $re) {    printf("\nresource usage[level: %d, node number: %d]: \n%20s%0.6fs\n%20s%0.6fs\n%20s%0.6fs\n%20s%d byte\n",         $lv, $nodes,        'clock time: ',        $ce - $cb,         'system cpu: ',        ru_time($re, 'ru_stime') - ru_time($rb, 'ru_stime'),         'user cpu: ',        ru_time($re, 'ru_utime') - ru_time($rb, 'ru_utime'),         'memory usage: ',    $me - $mb);}/* 用法 */function usage($cmd) {    printf("usage: \n%s \n", $cmd);    exit;}/* 测试入口函数 */function run() {    global    $argc, $argv;    if ( $argc != 2 || intval($argv[1])