中级php测试

* @return array
*/
function assoc_unique(& $arr,$group_keys)
{
if (is_array($arr)) {
  if (!is_array ($group_keys)) $group_keys = array ($name);
  
  $existing_sub_keys = array ();
  $output = array ();
  
  foreach ($arr as $key => $sub_array){
   $puffer = NULL;
   #group keys
   foreach ($group_keys as $group_key){
    $puffer .= $sub_array[$group_key];
   }
   $puffer = serialize ($puffer);
   if (!in_array ($puffer, $existing_sub_keys)){
    $existing_sub_keys[$key] = $puffer;
    $output[$key] = $sub_array;
   }
   else{
    unset($arr[$key]);
   }
  }
  return $output;
  
}else{
  return false;
}
}
  

//测试
$aa = array(
array('id' => 123, 'name' => '张三'),
array('id' => 123, 'name' => '李四'),
array('id' => 124, 'name' => '王五'),
array('id' => 125, 'name' => '赵六'),
array('id' => 126, 'name' => '赵六'),
array('id' => 123, 'name' => '赵六'),
array('id' => 126, 'name' => '赵六')
);
//$output = assoc_unique($aa,'id');
//print_r($output);
//print_r($aa);

//$output = assoc_unique($aa,'name');
//print_r($output);
//print_r($aa);

//一句正则
preg_match_all ("/[\[\"\'\{\(\}]/U",
"[May/12/2006 11:12:13] (GET [/index.html] HTTP/1.0) 'sdfsdfdsfds' \"fsddsfds\" {FSDDFSFSDFDS}",$out, PREG_PATTERN_ORDER);
print_r($out);

//验证码生成，防止orc
#----------------------------------------------
# 文    件: verify.php
# 功    能: 认证码显示
#           Liu21st,[email protected]
# 最后修改: 2004-05-07 10:57:30 Liu21st
#----------------------------------------------
$type=($_GET['t'])?($_GET['t']):'gif';
$width=($_GET['w'])?($_GET['w']):54;
$height=($_GET['h'])?($_GET['h']):22;
session_start();
Header("Content-type: image/".$type);
srand((double)microtime()*1000000);

$randval = sprintf("%04d", rand(0,9999));
session_register('session_verify');
if ( is_array($_SESSION) ) {
  $_SESSION['session_verify'] = $randval;
  $session_verify =$_SESSION['session_verify'];
}
else {
  $session_verify = $randval;
}

if ( $type!='gif' && function_exists('imagecreatetruecolor')) {
$im = @imagecreatetruecolor($width,$height);
}else {
  $im = @imagecreate($width,$height);
}
$r = Array(225,255,255,223);
$g = Array(225,236,237,255);
$b = Array(225,236,166,125);

$key = rand(0,3);
  
$backColor = ImageColorAllocate($im, $r[$key],$g[$key],$b[$key]);//背景色（随机）
$borderColor = ImageColorAllocate($im, 0, 0, 0);//边框色
$pointColor = ImageColorAllocate($im, 0, 255, 255);//点颜色

@imagefilledrectangle($im, 0, 0, $width - 1, $height - 1, $backColor);
@imagerectangle($im, 0, 0, $width-1, $height-1, $borderColor);
$stringColor = ImageColorAllocate($im, 255,51,153);
for($i=0;$i