php memcache模块优化配置详解

vi /etc/php.d/memcache.ini
[Memcache]
; Enable memcache extension module
extension=memcache.so
memcache.allow_failover = "1"
memcache.max_failover_attempts = "20"
memcache.chunk_size = "8192"
memcache.default_port = "11211"
memcache.hash_strategy = "standard"
memcache.hash_function = "crc32"

memcache.max_failover_attempts = "20"

memcache.default_port = "11211"

memcache.hash_strategy = "standard"

<?php
$mc = new Memcache;
$mc->connect("127.0.0.1",11211);
$item = $mc->get('item');
if(!is_array($item)){
echo "Add item to memcache";
$mc->add('item',array('item'));
}
$item = $mc->get('item');
var_dump($item);
?>

<?php
$zip = new ZipArchive;
if ($zip->open('test.zip') === TRUE) {
 for($i = 0; $i < $zip->numFiles; $i++)
   {
     if(substr_count($zip->getNameIndex($i), 'example.php')>0){
       $contents = $zip->getFromIndex($i);            
      }
   }
}
?>

exit($_GET['echostr']);

$token='11';
$signarr=array($token,$_GET['timestamp'],$_GET['nonce']);
if($this-&gt;signnature($signarr,$_GET['signature'])){
   exit($_GET['echostr']);
}
function signnature($arr,$signature){
   sort($arr);
   if(sha1(implode($arr))==$signature) return true;
   return false;
}

<?php

if ($a > $b) {
echo "a is bigger than b";
$b = $a;
}
?>

<?php
if ($a > $b) {
echo "a is bigger than b";
} else {
echo "a is NOT bigger than b";
}
?>

<?php

$a=45;

$b=50;

if ($a>$b)      {  print  “a大于b”;  }

elseif ($a==$b)      {  print  “a等于b”;  }

else      {  print “a小于b”;  }

?>

<?php

$i=1;

switch ($i) {
case 0:
echo  "i equals 0";
break;
case 1:
echo   "i equals 1";
break;
case 2:
echo   "i equals 2";
break;

default:
echo   "i no equals";
break;
}
?>

echo  ($a>$b)?“a大于b”:“a不大于b”;

function x()
 $x = debug_backtrace();
 //remove stack of this function
 array_shift($x);
 $i = 0;
 $xstr = '';
 foreach ($trace as $x) {
  //TODO need check exists args
  $args = $x['args'];
  if (!$args) {
   $argstr = '';
  } else {
   $argstr = '';
   $first = true;
   foreach ($args as $arg) {
    if (!$first) {
     $argstr .= ',';
    }
    $first = false;
    if (is_object($arg)) {
     $argstr .= 'Object[' . get_class($arg) . ']';
    }
    elseif (is_array($arg)) {
     $argstr .= 'Array';
    } else {
     $argstr .= $arg;
    }
   }
  }
  $xstr .= "[#$i] {$x['file']}({$x['line']}) {$x['function']} ($argstr)" . PHP_EOL;
  $i++;
 }

 return $xstr;
}