Vos Fonctions ou astuces

<?php
$folder = 'images/thumbs/'; // repertoire
function scandir_by_mtime($folder) {
  $dircontent = scandir($folder, 0);
  $arr = array();
  foreach($dircontent as $filename) {
    if ($filename != '.' && $filename != '..') {
      if (filemtime($folder.$filename) === false) return false;
      //$dat = date("YmdHis", filemtime($folder.$filename));
      
      $arr[filemtime($folder.$filename)] = $filename;
    }
  }
  if (!ksort($arr)) return false;
  else return $arr;
  
}
$files = array_slice(array_reverse(scandir_by_mtime($folder), true), 0, 5);

foreach($files as $filename) {
   
    echo '<li><a href="images/resized/'.$filename.'" title=""><img src="images/thumbs/'.$filename.'" title="'.$filename.'" alt="'.$filename.'" width="82px" height="65px" /></a></li>';
}
?>

<?php
//fonction trier_tableau, permet de réordonner des tableaux à deux dimensions en fonction de la clé donnée en paramètre
function  trier_tableau($table, $key){
	//variables
	$param = array (); //tableau des paramètres que l'on va trier
	$cle = array(); //tableau des clés retournées en param
	$tableau_trie = array(); //resultat
	
	//echo "Pas Trié<pre>".print_r($table,true)."</pre>";
	
	//déterminons les paramètres à trier
	for ($i = 0; $i < count($table); $i++) {
		$param[$i] = $table[$i][$key];
	}
	
	//trions les paramètres
	asort($param);
		
	
	//echo "Param<pre>".print_r($param,true)."</pre>";
	
	//on s'assure que le pointeur est bien revenu au début
	reset($param);
	
	//On refait un tableau pour déterminer le nouvel ordre des champs triés,
	for ($i = 0; $i < count($param); $i++) {
		$cle[] = key($param); // on récupère la clef de param
		next($param); // on passe à l'élément suivant
	}
	
	//echo "Cle<pre>".print_r($cle,true)."</pre>";
	
	// on refait le tableau en fonction de l'ordre accordé:
	for ($i = 0; $i < count($cle); $i++) {
		$tableau_trie[] = $table[$cle[$i]];		
	}
	
	//echo "Trié<pre>".print_r($tableau_trie,true)."</pre>";
	
	return $tableau_trie;
}

?>

<?php
//fonction trier_tableau, permet de réordonner des tableaux à deux dimensions en fonction de la clé donnée en paramètre
function  trier_tableau($table, $key){
	//variables
	$param = array (); //tableau des paramètres que l'on va trier
	$tableau_trie = array(); //resultat à retourner
	
	//déterminons les paramètres à trier
	for ($i = 0; $i < count($table); $i++) {
		$param[$i] = $table[$i][$key];
	}
	
	//trions les paramètres
	asort($param);
	
	//on s'assure que le pointeur est bien revenu au début
	reset($param);
	
	// on refait le tableau en fonction de l'ordre accordé:
	for ($i = 0; $i < count($param); $i++) {
		$tableau_trie[] = $table[key($param)];
		next($param);
	}
	
	return $tableau_trie;
}

?>

<?php
$test0 = array ("lettre" => "neuf", "num" => 9);
$test1 = array ("lettre" => "un", "num" => 1);
$test2 = array ("lettre" => "deux", "num" => 2);
$test3 = array ("lettre" => "cinq", "num" => 5);
$test4 = array ("lettre" => "quatre", "num" => 4);
$test5 = array ("lettre" => "trois", "num" => 3);
$test6 = array ("lettre" => "six", "num" => 6);
$test7 = array ("lettre" => "huit", "num" => 8);
$test8 = array ("lettre" => "sept", "num" => 7);
$test9 = array ("lettre" => "zéro"  , "num" => 0);
$test10 = array ("lettre" => "Re-trois", "num" => 3);

$table = array ($test0 , $test1 , $test2 , $test3 , $test4 , $test5 , $test6 , $test7 , $test8 , $test9, $test10);
$key = "num";

echo "Pas Trié<pre>".print_r($table,true)."</pre>";
echo "Trié<pre>".print_r(trier_tableau($table, $key),true)."</pre>";
?>

<?php
function sort_by_num(array $a, array $b)
{
    return strcmp($a['num'], $b['num']);
}

usort($table, 'sort_by_num');

<?php

echo memory_get_usage();

$a = 'llllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllll
llllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllll
llllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllll
llllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllll
llllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllll
llllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllll
llllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllll
llllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllll
llllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllll
llllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllll
llllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllll
llllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllll
llllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllll
llllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllll
llllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllll
llllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllll
llllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllll
llllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllll';

echo memory_get_usage();

$b = $a;

echo memory_get_usage();

$b[0] = 'a';
// $a[0] = 'a';

echo memory_get_usage();

?>

<?php
if ($i >= $nb AND $i <= $page - $nb)
        $i = $page - $nb;
elseif ($i >= $page + $nb AND $i <= $nb_page)
        $i = $nb_page - $nb;
$list_page[] = '...';
?>

<?php
function request($request,$db='localhost',$db_username='root',$db_password=''){
	$k=0;
	if($request=='connecter'){
		mysql_connect($db, $db_username, $db_password) or die('Connection à la base de donnée impossible');
		return true;
	}
	if($request=='deconnecter'){
		mysql_close();
		return true;
	}
	mysql_select_db($db) or die('<b>Impossible de sélectionner la base </b>"'.$db.'"<b> <br/>Erreur : </b>'.mysql_error());;
	$sql_data = mysql_query($request) or die('<b>Erreur de requête<br/>Erreur : </b>'.mysql_error());
	$temps_fin = microtime_float();
	$GLOBALS['sql_time'] += $temps_fin - $temps_debut;
	$GLOBALS['nb_request']++;
	if(substr($request,0,6)=='SELECT'||substr($request,0,4)=='SHOW'){
		while ($data = mysql_fetch_array($sql_data) ){
			$save_keys = array_keys($data);
			$i = count($data);
			$nb_to_delete = $i/2;
			reset($data);
			while($i){
				next($data);
				if($i==count($data)){ 
					$curent_element=current($data);
				}else{
					$curent_element = next($data);
				}
				$values[$i] = $curent_element;
				$i--;
			}
			$j = $nb_to_delete;
			while($j>0){
				unset($values[$j]);
				$j--;
			}
			
			$i = count($save_keys);
			reset($save_keys);
			while($i!=0){
				next($save_keys);
				if($i==count($save_keys)){ 
					$curent_element=current($save_keys);
				}else{
					$curent_element = next($save_keys);
				}
				$keys[$i] = $curent_element;
				$i--;
			}
			$j = $nb_to_delete;
			while($j>0){
				unset($keys[$j]);
				$j--;
			}
			$combine = array_combine($keys,$values);
			$return[$k]=$combine;
			$k++;
		}
		if(isset($return)){ return $return;}
	}
}
?>

<?php
Array
(
    [0] => Array
        (
            [id] => 1
            [nom] => Titi
            [code_postal] => 75000 
        )
    [1] => Array
        (
            [id] => 2
            [nom] => Toto
            [code_postal] => 77000
        )
    [2] => Array
        (
            [id] => 3
            [nom] => Tata
            [code_postal] => 71000
        )
)
?>

<?php
request('connecter','adresse_bdd','login','mot_de_passe');

// Ensuite vous faites vos requêtes comme ceci

$reponses = request('SELECT * FROM `clients`','client');

// Puis pour les traiter:
foreach($reponses a $reponse){
 echo 'Le code postal de '.$reponse['nom'].' est '.$code_postal
}

// Ou plus rapide si vous savez que vous n'aller avoir qu'une réponse (ici le nom du client avec l'ID 1)
$reponse = request('SELECT `nom` FROM `clients` WHERE `ID` = 1 ','client');
$reponse = $reponse[0]['nom']
?>

<?php
// [...]
if($request=='connecter'){
  mysql_connect($db, $db_username, $db_password) or die('Connection à la base de donnée impossible');
  return true;
}
if($request=='deconnecter'){
  mysql_close();
  return true;
}
// [...]