PHP - Passing Arrays Between Functions
I'm making a registration form and I'm really new at it. I've had a look about at similar issues but feel like I've got my code set up right, I obviously don't. I have a registration_handler.php and a functions.php file. I'm simply trying to pass an array ($errors[]) from the functions that generate them to a function that prints them out on registration_handler.php. It seems so easy, but I'm not getting it. Here's my code: from functions.php: (this is just an example of one of the functions) // USERNAME (MANDATORY) //uses the clean_names() and checks for empty input function assign_username() { global $conn; $username = $_POST['username']; if(!$username){ $errors[] = "A username is mandatory"; echo "A username is mandatory <br>"; } else { $username = clean_names($username); } //check for duplicate username and return $username if doesn't exist already $username_check = mysqli_query($conn, "SELECT username FROM users WHERE username='$username'"); $number_rows = mysqli_num_rows($username_check); if($number_rows > 0) { $errors[] = "Username already in use <br>"; echo "Username already in use <br>"; } else { return $username; } return $errors; } // END USERNAME Also from functions.php, the function to print out the error array: //display error array function show_errors($errors) { print_r($errors); } and the function call from registration_handler.php: if(isset($_POST['register_button'])) { //assign clean form variables $firstname = assign_firstname(); $lastname = assign_lastname(); $username = assign_username(); $email = assign_email(); $password = assign_password(); $date = date("Y-m-d"); $errors = array(); show_errors($errors); } I'm intentionally leaving the username out to test this on the form but I only get returned Array() It echos "Username is mandatory" but it seems like it's not passing the error string to the error array Can anyone point me towards what I'm doing wrong, please. I appreciate the replies Edited June 11 by TechnoDiverSimilar Tutorialsi have two functions. In function two it has $id=9. how do i get function one to echo $id? how do i adjust the below example to accomplish this? Code: [Select] $newdb = new Database(); class Database { function one() { $newdb->two(); echo $id; } function two() { $id = 9 return $id; } } hi guys im back for more php questions hope you dont get annoyed <?php function getvalue($num) { echo "<input type='text' name='txt1' value='$num'>"; } ?> <html> <head> <title>Home</title> </head> <body> <form action="" method="POST"> <input type="text" name="txt1" id="txt1" value="0"> <input type="button" name="btn1" id="btn1" value="1" onclick="getvalue(1);"> <input type="button" name="btn2" id="btn2" value="2" onclick="getvalue(2);"> </form> </body> </html> here is my code my question is how can i pass the values at the php function? how can i display the passed value to the textbox txt1? is this code correct? echo "<input type='text' name='txt1' value='$num'>"; I have a little problem. I have made a script(function) to connect to the database. this is the script: connect(php) Code: [Select] <?php $server = "localhost"; $username = "username"; $password = "password"; function connectdatabase($type,$database) { if($type == "mysql") { $mysql = mysql_connect($server, $username, $password); mysql_select_db($database, $mysql); } else if($type == "mysqli") { $mysqli = new mysqli($server, $username, $password, $database); } else if($type == "mssql") { $mssql = mssql_connect($server, $username, $password); mssql_select_db($database, $mssql); } function query($query) { if($type == "mysql") { mysql_query($query); } else if($type == "mysqli") { $mysqli->query($query); } else if($type == "mssql") { mssql_query($query); } } } ?> and aanmelden(php) Code: [Select] <?php include("config.php"); connectdatabase("mysql", "[ledensysteem]"); //example if(!empty($_POST)) { if(!preg_match('/^[A-Za-z1-9-]{'.$Minimale_Gebruikersnaam_Karakters.',}$/', $_POST['gebruikersnaam'])) { if(!isset($error)){ $error=1;}else{$error=$error+1;} echo "Je gebruikersnaam moet minimaal {$Minimale_Gebruikersnaam_Karakters} tekens bevaten en mag geen komma of andere onbedoelde tekens zijn<br>Toegestaan is <br>A t/m Z <br>a t/m z <br>1 t/m 9 <br>en -"; } else { echo "geldige gebruikersnaam(goedgekeurd)"; } if(preg_match('/^[A-Za-z1-9-]{'.$Minimale_Wachtwoord_Karakters.',}$/', $_POST['wachtwoord']) && preg_match('/^[A-Za-z1-9-]{'.$Minimale_Wachtwoord_Karakters.',}$/', $_POST['herhaalwachtwoord'])) { if($_POST['wachtwoord'] != $_POST['herhaalwachtwoord']) { if(!isset($error)){ $error=1;}else{$error=$error+1;} echo "niet hetzelfde wachtwoord"; } /*else { echo "hetzelfde wachtwoord (goedgekeurd)"; }*/ } else { if(!isset($error)){ $error=1;}else{$error=$error+1;} echo "wachtwoord moet minimaal {$Minimale_Wachtwoord_Karakters} tekens bevatten!"; } if(!preg_match("/^[A-Za-z1-9_.-]{1,}@[A-Za-z1-9-]{1,}\.[A-Za-z1-9]{2,3}$/", $_POST['email'])) { if(!isset($error)){ $error=1;}else{$error=$error+1;} echo "onjuiste email"; } else { echo "goedgekeurd!"; } if(!isset($error)) // this problem is fixed yesterday on phpfreaks.com forum! { echo "goedgedaan geen errors!"; query("SELECT username FROM phpfreaks WHERE password = private"); // example } } else { ?> <HTML> <HEAD> <TITLE>New Document</TITLE> </HEAD> <BODY> <form method="post"> <input type="text" name="gebruikersnaam" value="gebruikersnaam" maxlength="20" size="20"> <input type="password" name="wachtwoord" value="wachtwoord" maxlength="20" size="20"> <input type="password" name="herhaalwachtwoord" value="herhaalwachtwoord" maxlength="20" size="20"> <input type="text" name="email" value="voorbeeld@domeinnaam.extensie" maxlength="50" size="20"> <input type="submit" name="login" value="inloggen"> </form> </BODY> </HTML> <?php } ?> the problem is, is that i want to pass a variable between functions like $type (the database type) between connectdatabase(); and query(); in the 'aanmelden.php' file is an example of how i use the function (on line 3 and 45 the ones with //example comment) thanks for reading. please help. ps. config.php contains include("connect.php"); ok so here the deal. i have to write a script that searches a giant database of school and returns the contact info for all schools matching the search term. no big deal it's cake to code something that simple... but wait there more! the search must be executed by a joomla page... we crap. joomla doesn't allow me to run php scripts... so i found a little plugin called jumi that lets me do just that. and it works great minus all the errors joomla spits out because the mysql_connect statement and the mysql_query statment are connecting to a different database than the one joomla is installed onand thus joomla thinks the tables i am searching don't exist so joomla outputs this 4 page long error code in a bright red box a the top of the page. so i tried turning off joomls error reporting.. no bueno. so i figured no problemo i'll just have the script call out to a .php file hosted else where on the server and pass the search terms to that file via $_POST. then have said file execute a quick search of the database and return the results back to the original joomla page from whence the search commenced via a nice tidy $_POST array. one problem how in hades do you pass around php arrays via $_POST? I everyone, I'm developing a small MVC framework for my personal work, now, in order to have access from all the classes to certain variables I've created a registry class, for this to work I have 2 options: 1.- passing every time the registry object to the constructor class(controllers, models, etc) or 2.- create in the registry static set and get so I can reach the variables by Registry::set(name, value) and Registry::get(name) My question is, which one of this two options takes less resources(is faster)? I hope anyone can help me with this, thanks in advance I have a script I am putting together that simulate a cricket game. The only issue is, that there are a huge number of functions because there doesn't seem to be any other way to do this properly. As well as this, there a while() loop and all this seems to be leading to the page reaching a max 30 second timeout when generating the result. My code is attached below, it is quite messy at the moment because i've just be working on it, but I was wondering if anyone has any solutions of how I can speed this up or change to prevent a timeout: <?php // Error reporting error_reporting(E_ALL); // Connect DB mysql_connect("wickettowicket.adminfuel.com", "rockinaway", "preetha6488") or die(mysql_error()); // Select DB mysql_select_db("wickettowicket") or die(mysql_error()); // MySQL queries to find batsmen and bowlers $array_batsmen = mysql_query('SELECT id, name, ability, strength FROM wtw_players WHERE team_id = 1 ORDER BY id ASC'); $array_bowlers = mysql_query('SELECT id, name, ability, strength FROM wtw_players WHERE team_id = 2'); // Start table for data $data = '<table width="600px">'; // Create blank scorecard while ($array_bat = mysql_fetch_array($array_batsmen)) { $data .= '<tr><td>'.$array_bat['name'].'</td><td></td><td></td><td>0</td></tr>'; } // Set up arrays for players $current_batsman = $current_bowler = array(); // Reset query mysql_data_seek($array_batsmen,0); $in_one = $in_two = $it = ''; function currentBatsman($id, $name, $ability, $strength, $out, $in, $runs) { global $current_batsman; $current_batsman = array ( 'id' => $id, 'name' => $name, 'ability' => $ability, 'strength' => $strength, 'out' => $out, 'in' => $in, 'runs' => $runs ); echo 'set current'; } // Set up arrays of batsmen while ($array = mysql_fetch_array($array_batsmen)) { if ($it < 3 && $in_one == '') { currentBatsman($array['id'], $array['name'], $array['ability'], $array['strength'], 0, 1, 0); $batsmen[$array['id']] = array ( 'id' => $array['id'], 'name' => $array['name'], 'ability' => $array['ability'], 'strength' => $array['strength'], 'out' => 0, 'in' => 1, 'runs' => 0 ); $in_one = $array['id']; $current = $array['id']; $it++; } else if ($it < 3 && $in_two == '') { $batsmen[$array['id']] = array ( 'id' => $array['id'], 'name' => $array['name'], 'ability' => $array['ability'], 'strength' => $array['strength'], 'out' => 0, 'in' => 1, 'runs' => 0 ); $in_two = $array['id']; $it++; } else { $batsmen[$array['id']] = array ( 'id' => $array['id'], 'name' => $array['name'], 'ability' => $array['ability'], 'strength' => $array['strength'], 'out' => 0, 'in' => 0, 'runs' => 0 ); } } // Bowler Array while ($array = mysql_fetch_array($array_bowlers)) { $bowlers[] = array ( 'name' => $array['name'], 'ability' => $array['ability'], 'strength' => $array['strength'] ); } // Reset both queries mysql_data_seek($array_bowlers,0); mysql_data_seek($array_batsmen,0); function changeBatsman($just_out) { global $array_batsmen, $batsmen; //Update array $batsmen[$just_out] = array ( 'in' => 1, 'out' => 1 ); while ($array = mysql_fetch_array($array_batsmen)) { if ($just_out != $array['id'] && $batsmen[$array['id']]['out'] != 0) currentBatsman($array['id'], $array['name'], $array['ability'], $array['strength'], 0, 1, 0); } // Reset query mysql_data_seek($array_batsmen,0); echo 'change batsman'; } function swapBatsman($other_batsman) { global $array_batsmen, $batsman; while ($array = mysql_fetch_array($array_batsmen)) { if ($other_batsman != $array['id'] && $batsman[$array['id']]['out'] != 0 && $batsman[$array['id']]['in'] == 1) currentBatsman($array['id'], $array['name'], $array['ability'], $array['strength'], 0, 1, 0); } // Reset query mysql_data_seek($array_batsmen,0); echo 'swap batsman'; } $runs = $outs = $balls = $overs = 0; $played = array(); function selectBowler() { global $bowlers, $current_bowler; // Select random bowler $choose_bowler = array_rand($bowlers, 1); $current_bowler = array ( 'name' => $bowlers[$choose_bowler]['name'], 'ability' => $bowlers[$choose_bowler]['ability'], 'strength' => $bowlers[$choose_bowler]['strength'] ); } /* function selectBatsman(); { global $array_batsmen; while ($array_batsmen[]['out'] != 1) { }*/ function bowl() { global $batsmen, $bowlers, $current_bowler, $current_batsman, $data, $balls, $outs, $runs; if ($current_batsman['out'] == 0) { echo 'bowling'; // Set the initial number $number = rand(0, 190); // Ability of batsman if ($current_batsman['ability'] > 90) $number += 30; else if ($current_batsman['ability'] > 70) $number += 15; else if ($current_batsman['ability'] > 50) $number += 2; else $number = $number; // Strength of batsman if ($current_batsman['strength'] > 90) $number += 15; else if ($current_batsman['strength'] > 70) $number += 10; else if ($current_batsman['strength'] > 50) $number += 5; else $number = $number; // Depending on overs if ($balls > 270) $number += 30; else if ($balls > 120) $number -= 10; // Ability if ($current_bowler['ability'] > 90) $number -= 30; else if ($current_bowler['ability'] > 70) $number -= 15; else if ($current_bowler['ability'] > 50) $number -= 2; else $number = $number; // If batsman has made a huge total of runs, we need to knock some numbers off - more likely to get out if ($current_batsman['runs'] > 200) $number -= 70; else if ($current_batsman['runs'] > 100) $number -= 30; // Finally sort out runs if ($number > 190) $run = 6; else if ($number > 170) $run = 4; else if ($number > 160) $run = 3; else if ($number > 100) $run = 2; else if ($number > 50) $run = 1; else if ($number > 10) $run = 0; else if ($balls > 120 && $number > 0) $run = 0; else $run = -1; // Increase number of balls $balls += 1; // Are they out? if ($run == -1) { $current_batsman['out'] = 1; $played[] = $current_batsman['id']; $find = '<tr><td>'.$current_batsman['name'].'</td><td></td><td></td><td>0</td></tr>'; $replace = '<tr><td>'.$current_batsman['name'].'</td><td></td><td>'.$current_bowler['name'].'</td><td>'.$current_batsman['runs'].'</td></tr>'; $data = str_replace($find, $replace, $data); changeBatsman($current_batsman['id']); echo 'out'; } else { $current_batsman['runs'] += $run; $runs += $run; if ($run == 1 || $run == 3) { swapBatsman($current_batsman['id']); echo 'time to swap'; } echo $run; } // Count outs if ($current_batsman['out'] == 1) $outs += 1; } } function game() { global $main, $batsmen, $bowlers, $data, $batted, $balls, $outs, $current_batsman; // Check if possible while ($balls <= 295 && $outs < 10) { selectBowler(); // Actually bowl now bowl(); } } game(); echo $data; I have this thing that i am trying to make but i cant get it to work.. can anyone help? Code: [Select] function sql_read( $dbname,$dbusername,$dbpassword ) { $names = array(); $password = array(); $connect = @mysql_connect("mysql11.000webhost.com",$dbusername,$dbpassword) or die("Could Not Connect"); @mysql_select_db ($dbname) or die("Could not find DataBase"); $query = mysql_query("select * from users"); $numrows = mysql_num_rows($query); if ($numrows > 0){ while($row = mysql_fetch_assoc($query)){ $names[] = $row["uname"]; $password[] = $row["password"]; $id = $row["id"]; } $return = array($names,$password,$id); }else{ $return = array(); } return $return[]; } $names = array(); $names = sql_read("XXXXXX","XXXXXX","XXXXXXX")[0]; The error i get is Code: [Select] Parse error: syntax error, unexpected '[' in /home/a5480952/public_html/sql/index.php on line 28 Line 28 is "$names = sql_read("XXXXXX","XXXXXX","XXXXXXX")[0];" Please help... i REALLLLD need help with this.. ask questions if you want to know more about what i am trying to do... thanks! I'm having troubling with trying to create a function to spit out a single array with the following array. I can write it in a away that looks through the arrays manually. the results i am trying to generate is that each item in generated array. Array to convert array( "account" => array( "login", "register", "logout", "edit", ), "p" => array( "report", ), "array1.0" => array( "array2.0" => array( "array3.0", "array3.1 ), "array2.1", ), generating the array will look like this
Array ( [0] => account [1] => account/login [2] => account/register [3] => account/logout [4] => account/edit [5] => p [6] => p/report [7] => array1.0 [8] => array1.0/array2.0 [9] => array1.0/array2.0/array3.0 [10] => array1.0/array2.0/array3.1 [11] => array1.0/array2.1 ) The idea is that id generates a single array with combined labels and arrays inside, etc. I just can't figure out how to create a script that will create this array even If I add a new value or array.
I teaching myself php, but I am coming from java and other compiled languages, so the process has been a little bumpy. I am trying to do something like this: Code: [Select] class my_class { function one () { $two = two (); $three = three (); $five = $two + $three; return $five; } function two () { $two = 2; return $two; } function three () { $three = 3; return $three; } } Unfortunately, I keep getting an error message saying that my call to two () is an undefined function. I am gathering from this that the scope of one () is not aware of the existence of two (). Is there a way to get around this so I can call two () and three () from one ()? I have two arrays, both with the same key values. I'd like to combine them. So for instance... Code: [Select] <?php $array1['abcd'] = array( 'value1' => "blah", 'value2' => "blahblah"); $array1['efgh'] = array( 'value1' => "ha", 'value2' => "haha", 'valuex' => "xyz"); $array2['abcd'] = array('value3' => "three", 'value4' => "four"); $array2['efgh'] = array( 'value3' => "hohoho", 'value6' => "six6"); function combine_arrays($array1,$array2) { //*combining* return $single_array; } echo "<pre>"; print_r(combine_arrays($array1,$array2)); echo "</pre>"; /* would produce ['abcd'] = ( 'value1' => "blah", 'value2' => "blahblah", 'value3' => "three", 'value4' => "four" ) ['efgh'] = ( 'value1' => "ha", 'value2' => "haha", 'valuex' => "xyz", 'value3' => "hohoho", 'value6' => "six6" ) */ ?> What's the easiest way to do this? Code: [Select] <?php $parentesco .=' <ul><li><a href="children.php?category_id='.$idc.'&name= '. $name2 . '">'. $name. ' </a></li></ul>'; ?> in the url string $idc is passing but $name2 is not. $name2 is pickup from a query, I echo that value everywhere in the code and it echo its value but is not passing so how. Help I have some function or method. Is there a better design patter to implement this?
function myFunction($a=null,$b=null,$c=null,$d=null,$e=null,$f=null,$g=null,$h=null) { //Do a bunch of stuff }Maybe the second function? function myNewFunction($data=array()) { $data=array_merge(array('a'=>null,'b'=>null,'c'=>null,'d'=>null,'e'=>null,'f'=>null,'g'=>null,'h'=>null),$array); //Do a bunch of stuff }Please provide decision making factors why you would use one approach over the other. i am wondering what the '@' is used for when used in front of a function like Function(@$VAR); What is the benefit of the @? When in OOP I have been watching tutorials and some have functions just written like Code: [Select] class user { public $user; public function __construct($u) { $this->user = $u; } } do I need to type public before the function or is it better practice to just put Code: [Select] class user { public $user; function __construct($u) { $this->user = $u; } } Thanks! OK, so if I've got this in my one of my class files: public function userr($user) { $thisquery = mysql_query("SELECT * FROM users WHERE username='". $user ."'"); if(mysql_num_rows($thisquery) == 1) { return true; } return false; } Could I use something like this: if($class->userr($user)) { // Something } If not, how would I go about doing something like it? And is there any way I could use a mysql_fetch_assoc in a function? Can someone tell me by looking at the following code why function pcust() does not work, I am new to programming? Code: [Select] $firstname = "chris"; $surname = "reynolds"; $address1 = "12 birch end"; $town = "Wallington"; $county = "surrey"; $postcode = "wh20 3bg"; $telephone = "01372 854785"; $cust_details = fix_cust($firstname, $surname, $address1,$town, $county, $postcode, $telephone ); function fix_cust($n1, $n2, $n3, $n4, $n5, $n6, $n7) { $n1 = ucfirst(strtolower($n1)); $n2 = ucfirst(strtolower($n2)); $n3 = ucwords(strtolower($n3)); $n4 = ucfirst(strtolower($n4)); $n5 = ucfirst(strtolower($n5)); $n6 = ucfirst(strtoupper($n6)); $n7 = ucfirst(strtolower($n7)); return array($n1, $n2, $n3, $n4, $n5, $n6, $n7); } echo $cust_details[0] . " " . $cust_details[1]; echo "<br />"; echo $cust_details[2]; echo "<br />"; echo $cust_details[3]; echo "<br />"; echo $cust_details[4]; echo "<br />"; echo $cust_details[5]; echo "<br />"; echo $cust_details[6]; echo "<br />"; function pcust(){ $length = count($cust_details ); for ($i = 0; $i < $length; $i++) { echo $cust_details[$i]; echo "<br />"; } } pcust(); Hi. I am trying to write a function but they are new to me and confusing me. On multiple pages I am requesting users details. I thought instead of writing out the query every time I want to do this I would include a functions page with the query in it. The only variable I carry from the user is the user name as a session when they log in. The user name is the email address of the person signed in. so here is my first function. As im sure you can see it doesn't work but I don't understand why or how to call it properly. Can someone please explain.... function GetUser($user = "") { $qFindUser = "SELECT * FROM members WHERE email = '$user'"; $rFindUser = mysql_query($qFindUser) or die (mysql_error()); $UserInfo = mysql_fetch_array($rFindUser); } calling the function to return all details of a member as an array. <?php $Name = $_SESSION['MM_Username']; $UserInfo = GetUser($Name); echo $UserInfo['forename']; ?> I have a function to get some data from the database. However it always comes back with: Code: [Select] Notice: Undefined variable: db in C:\wamp\www\ASF A Simple Forum\functions\functions.php on line 233 Fatal error: Call to a member function query() on a non-object in C:\wamp\www\ASF A Simple Forum\functions\functions.php on line 233 here is the code: require_once(ASF_ROOT."includes/init.php"); // this is where the db connection is function get_db_info($type, $select, $table, $where="", $order="DESC", $limit="") { if (empty($type) || empty($select) || empty($table)) { try { throw new emptyArgs(); } catch (emptyArgs $invalid) { echo "<div style=\"border:1px solid #f00; padding:5px; width:350px; line-height:10px;\">"; echo "<b>$invalid</b>"; echo "<p>get_info() needs atleast 3 arguments (Type, Select and Table) - none supplied</p>"; echo "</div>"; } } else { if ($type == "num") { $query = $db->query(" SELECT $select FROM ".TBL_PREFIX."$table $where $order $limit ") or die($db->error()); $result = $db->num_rows(MYSQLI_NUM); return $result; } else { $query = $db->query(" SELECT $select FROM ".TBL_PREFIX."$table $where $order $limit "); $result = $query->fetch_array(MYSQL_ASSOC); return $result; } } } I have a function for mysqli_real_escape_string above this function and it works with no errors. Have i done something wrong? as you can see i am including the file which holds the connection but it doesnt seem to use it. every other file that uses the connection works fine. As painfully simple as this may be, I seem to be doing something wrong as always. New to php and decided to start using functions. I'm trying to add functions from an external functions.php file to my other pages and then call the functions where necessary. How should I go about it? I tried something like this: Functions.php: Code: [Select] <?php function field() { echo 'text heherh'; } ?> and then when calling it to when needed for example: include 'includes/functions.php'; // at the top of the page Code: [Select] <?php // and when trying to call the function on a specific line if (!$sname) $errorstring = $errorstring . "<b>Surname:" . field() ; //field being the function name ?> I know this is very simple but I have never used functions before.. tried google, didn't help much and I'm pressed for time so decided to ask here. Thanks in advance |