Php

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Instal·lar noves extencions 

pecl install imagick

Executar un script amb un altre php.ini 

php -c /etc/php.insecure.ini script.php


Per fer una redirecció d'una web 

<?php
header("Location: http://www.wekk.net/index2.php");
?>

Per fer que el php no pugui obrir arxius que tenen un uid diferent del propietari de l'arxiu php, cal afegir al php.ini 

 safe_mode = On



safe_mode_include_dir = /usr/bin


Per veure info sobre el server 

print_r($_SERVER);
echo $_SERVER["HTTP_HOST"];


Contingut

CAPÇALERES DE CACHÉ

Per a que no cachegi mai res 

header("Content-type: text/plain"); 
header("Expires: Sat, 1 Jan 1997 00:00:00 GMT");
header("Last-Modified: Thu, 09 Feb 2006 10:05:57 GMT");
header("Cache-Control: no-store, no-cache, must-revalidate");
header("Cache-Control: post-check=0, pre-check=0", false);
header("Pragma: no-cache");


Per a que cachegi durant un temps (en aquest cas 3h) 

$offset = 60*60*3;
Header("Cache-Control: must-revalidate");
//Header("Cache-Control: proxy-revalidate");
header("Last-Modified: " . gmdate("D, d M Y H:i:s") . " GMT");
$ExpStr = "Expires: " . gmdate("D, d M Y H:i:s", time() + $offset) . " GMT";
Header($ExpStr);

eaccelerator

Optimitzador i cachejador dels scripts php un cop ja "compilats"

http://eaccelerator.net

Instal·lar-lo 

phpize
./configure 
make
make install

Actualitzar el php

  • Desactivar el eaccelerator (comentar el .ini)
  • Actualitzar el php
  • make clean
  • phpize
  • ./configure
  • make
  • make install
  • Activar el eacelerator
  • iptables -A INPUT -p tcp --dport 80 -s la_teva_ip -j ACCEPT
  • iptables -A INPUT -p tcp --dport 80 -j DROP
  • Fer un reload de l'apache i veure si tot funciona ok
  • iptables -D INPUT -p tcp --dport 80 -s la_teva_ip -j ACCEPT
  • iptables -D INPUT -p tcp --dport 80 -j DROP

Canviar charset d'una Base de dades

$COLLATION_TO = "utf8_unicode_ci"; $COLLATION_BINARY_TO="utf8_bin"; $COLLATION_FROM = "latin1_spanish_ci"; $COLLATION_BINARY_FROM="latin1_bin"; $CHARACTER_SET_TO = "utf8";

$db = mysql_connect( "climisql", 'promeba_2009', 'prMB159' ); mysql_select_db( 'promeba_db', $db);

$result = mysql_query( "SHOW TABLES;" ); 

while ($table = mysql_fetch_array($result, MYSQL_NUM)) {
  //$query = "ALTER TABLE ".$table[0]." COLLATE ".$COLLATION_TO;
  //printf("%s\n", $query); 
  //$row = mysql_query($query);
  //if (!$row) echo "ERROR: ". mysql_error();
  $query ="SHOW FULL COLUMNS FROM $table[0] WHERE Collation = '".$COLLATION_FROM."'";
  printf("%s\n", $query); 
  $row = mysql_query($query);
  while ($column = mysql_fetch_array($row, MYSQL_NUM)) {
      //printf("\t%s(%s)\n", $column[0], $COLLATION_FROM); 
      $query ="ALTER TABLE $table[0] CHANGE $column[0] $column[0] $column[1] CHARACTER SET $CHARACTER_SET_TO COLLATE $COLLATION_TO";
      echo " => $query\n";
      $a = mysql_query($query);
      if (!$a) echo "ERROR: ". mysql_error();
  }

}
echo "done!";



Proxy amb PHP 

<?php
# NOTE: The idea is that your url will be the same as us, but with a new parameter like "requestid" to test if the request is valid

# Config
$PROXY_BASE="/proxy";
$IMAGE_BASE="/webviewer";
$IMAGE_SERVER="10.84.130.17";

# Check that is a valid request (sample)
if (! check($_SERVER[REQUEST_URI]) ){
	echo "This isn't a validated request!"; 
	exit();
} 

# Here we'll remove the garbage (proxy base and your requestid)
$from = str_replace($PROXY_BASE, "", $_SERVER[REQUEST_URI]); 

# We generate the url to connect
$to = "http://" . $IMAGE_SERVER . $IMAGE_BASE . $from;

# Send the response of the IMAGE_SERVER to the client
$file = fopen ( $to, "r");
while (!feof($file)) {
    echo fread($file, (1*(1024*1024)));
    flush();
}

?>
Obtingut de "http://www.wekk.net/wiki/Php"