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PHP - Array_push And Array_chunk Difficulties
Our disc golf league uses a little PHP script that I developed (stealing lots of code in the process) that sucks in a list of league players from a text file, lets you select the ones that show up on league day, and randomly assigns the selections into foursomes and threesomes (Demo: http://edge.byethost18.com/demo4/foursomes.php)
Here's a modified example using letters of the alphabet:
. . . and the code: The actual version uses the shuffle() function to randomize the assignments and has a refresh button to reshuffle the assignments if a grouping contains bitter enemies. I disabled it in the example in order to show how the "A-B-C"s are assigned to the groups. As you can see, it assigns "A" to the first group, "B" to the second group, "C" to the third group and so on until it reaches the last group and then starts back at group 1 with the next letter. One of the our players wants a modification. He wants to be able to assign players into foursomes/threesomes according to their handicaps (best to worst). In other words, Group 1 would contain A, B, C, D. Group 2 would contain E, F, G, H and so on. Naturally, this would depend on which player checkboxes are selected, but the order is maintained. What I am having trouble with is getting the "A-B-C"s assigned into groups in the order they are listed in the text file. I tried using array_chunk() in the following script: https://neth.roe3.org/mdrone/ABCs/foursomes2.php
. . . and the code: In a nutshell, here's the code that's doing the work . . .
$numgroups = $d; $rows = array_chunk($players,$numgroups);
$x=0; I'm sure there's a simple solution. I'm just not seeing it. I'm really just a hobbyist . . . not a real programmer by any stretch of the imagination. Thanks for any help anyone can send my way. BTW . . . if anyone is interested in the foursomes generator source, I'm happy to share it. It could probably use improvement. Similar TutorialsHello all. I'm pretty new to this, but I'm trying to build a script that will write random questions for a quiz app that I'm working on. The data is contained in two different tables. I'm trying to randomize the question order that is spit out, as well as randomize the answer order that is displayed. The output has to be in the specific JSON string that is denoted in the code. There are no errors when I go the url that I load the script, however, the string is not populated with any of the data from my tables (it is just an empty set of strings in the JSON format that the program requires. Could someone please take a look at this and tell me where I'm going wrong. I've checked that the query is pulling from the correct databases so I know that's not the problem. Thank you in advance. Code: [Select] <?php //Connect To Database $hostname=""; $username=""; $password=""; $dbname=""; $question_table="wp_mtouchquiz_question"; $answer_table="wp_mtouchquiz_answer"; $yourfield = "question"; $question = "question"; $answer = "answer"; $connection = mysql_connect($hostname, $username, $password); $lastQuestionID = -1; $str = ""; mysql_select_db($dbname, $connection); # Check If Record Exists $query = "SELECT * FROM $question_table q, $answer_table a WHERE q.ID = a.QUESTION_ID AND q.quiz_id = 1 ORDER BY question_id ASC, correct DESC"; $result = mysql_query($query); $questions = array(); $fields = array(); if($result) { while($row = mysql_fetch_array($result)) { if($lastQuestionID != $row["question_id"]) { $fields = array(); if($lastQuestionID != -1) { array_push($questions, $fields); } $fields = array(); $lastQuestionID = $row["question_id"]; $fields["question_id"] = $row["question_id"]; $fields["question"] = $row["question"]; } // correct if($row["correct"] == 1) { $fields["correct"] = $row["answer"]; } // incorrect if ($row["sort_order"] ==2) { $fields["incorrect0"] = $row["answer"]; } // incorrect if ($row["sort_order"] ==3) { $fields["incorrect1"] = $row["answer"]; } // incorrect if ($row["sort_order"] ==4) { $fields["incorrect2"] = $row["answer"]; } if ($row["sort_order"] ==5) { $fields["incorrect3"] = $row["answer"]; } } $str .= "{\"childItems\":["; $numQuestionsToUse = 172; //Set this larger than returned questions or less than row limit / 5 $randomQuestionKeys = array_rand($questions, $numQuestionsToUse); $numQuestions = count($randomQuestionKeys); for($i = 0; $i < $numQuestions ; $i++){ $pickedField = $questions[$randomQuestionKeys[$i]]; $str .= "{\"itemId\":\"question" . $pickedField["question_id"] . "\","; $str .= "\"itemType\":\"BT_questionItem\","; $str .= "\"questionText\":\"" . $pickedField["question"] . "\","; $str .= "\"correctAnswerText\":\"" . $pickedField["answer"] . "\","; $incorrectAnswers = array(); array_push($incorrectAnswers, $pickedField["incorrect0"]); array_push($incorrectAnswers, $pickedField["incorrect1"]); array_push($incorrectAnswers, $pickedField["incorrect2"]); array_push($incorrectAnswers, $pickedField["incorrect3"]); $incorrectAnsKey = array_rand($incorrectAnswers, 3); $str .= "\"incorrectText1\":\"" . $incorrectAnswers[$incorrectAnsKey[0]] . "\","; $str .= "\"incorrectText2\":\"" . $incorrectAnswers[$incorrectAnsKey[0]] . "\","; $str .= "\"incorrectText3\":\"" . $incorrectAnswers[$incorrectAnsKey[0]] . "\","; $str .= "\"imageURLSmallDevice\":\"http://www.myquizcoach.com/extras/images/clear_header.png\","; $str .= "\"imageURLLargeDevice\":\"http://www.myquizcoach.com/extras/images/clear_header.png\"},"; } // remove last comma $str = substr($str,'',-1); $str .= "] }"; echo $str; } ?> Hey guys I have the following script that correctly retrieves 2 values from mysql: security_code and selected_address: The problem I have, is how can I add the retrieved values (more than 1 row) inside an array called $data $data = array(); $result = mysql_query("SELECT security_code, selected_address FROM purchase WHERE purchase_id = '412012' AND selected_address = 'General Roca 900' ORDER BY `offers_bought`.`security_code` ASC"); $cant = 0; while($row=mysql_fetch_array($result)) { array_push($data[$row['selected_address']], $row['security_code']); $cant++; } The array_push function gives me the following error: Warning: array_push() [function.array-push]: First argument should be an array in C:\wamp\www\Test\test\excelTest.php on line 24 In other words this is want I want to achieve: $data = array(array("selected_address" => $row['security_code'])); Only that this example adds only 1 retrieved row Any ideas? Thanks in advance! Cheers, I am trying to add new elements to an empty array using a form and submit button and the code is not adding anything from it. Here is the code I use:
<!DOCTYPE html>
<html>
<head>
<title>
</title>
</head>
<body>
<div class="site">
<div class="menu">
</div>
<div class="head">
</div>
<div class="content">
<form>
<input type="text" value="" name="add"/><br/>
<input type="submit" value="Add" name="submit"/>
</form>
</div>
<div class="footer">
</div>
</div>
</body>
</html>
<?php
$submit = $_POST["submit"];
$field = $_POST["add"];
$list = array();
if($submit){
$psh = array_push($list,$field);
echo $list;
}
?>
Any idea why is it not working?Hi if ive made a variable how do i tell it to be less than or equal to another variable ? currently im using $lowhigh_price = ( <= 0.75 * $av_price); but it tells me there is something wrong hlep please I've been at this now for a while but I'm struggling to understand this code. I understand the bigger picture of what the code is doing but I can't seem to graps the logic behind the code and the steps it's taking. Here is part of the code:
class Validate{
private $_passed = false,
$_errors = array(),
$_db = null;
if($rule === 'required' && empty($value)){
$this->addError("{$item} is required");
} else if(!empty($value)){
switch($rule){
case 'min':
if(strlen($value) < $rule_value){
$this->addError("{$item} must be a minimum of {$rule_value}");
}
private function addError($error){
$this->_errors[] = $error;
}
public function errors(){
return $this->_errors;
}
I'm struggling to understand how the error methods and properties are being used. I can't see what is being used within the class or outside of it. Here is the code outside the class:
$validate = new Validate();{
$validate = new Validate();
$validation = $validate->check($_POST, array(
'username' => array(
'required' => true,
'min' => 2,
'max' => 20,
'unique' => 'users'
),
'password' => array(
'required' => true,
'min' => 6
),
'password_again' => array(
'required'=> true,
'matches'=> 'password'
),
'name' => array(
'required' => true,
'min' => 2,
'max' => 50
)
));
if($validation->passed()){
echo 'passed';
} else{
foreach ($validation->errors() as $error){
echo $error, '<br>';
}
Looking at the 2nd part I cannot see why the programmer has put errors() as $error. Why not just create a method so you don't need to say "as $error". Also looking at the first part:
private function addError($error){
$this->_errors[] = $error;
}
public function errors(){
return $this->_errors;
}
I don't understand why he has created two methods. Why not just create one? How is the public errors method able to display the errors within the class because _errors doesn't look like it contains anything.
Can someone please break this down and help me to understand this because I've been at this for a while and I'm not really getting anywhere. Your help would be much appreciated.
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