PHP - How Pass Empty Or Nothing To A Default Parameter For A Function?

Hello

I am experiencing some issues with a function and I cannot identify the problem.
The function is not receiving any parameter.

The URL values are passed correctly.  I used echo to display the parameters outside the function and that worked.
I also used echo to display the parameters inside the function and no parameter were displayed. 
So the function is not receiving parameters. 


Code: [Select]
<?php

$find = $_REQUEST['u_find'];
$field = $_REQUEST['u_field'];
$searching = $_REQUEST['u_search'];


 echo"(1a)$find, (1b)$field, (1c)$searching";//outside function

function test_display($searching, $field, $find)
{
   echo"(2a)$find, (2b)$field, (2c)$searching";//inside function
 
}

?>

Code: [Select]
function fetch_feedback_best()
{
$sql = "SELECT
`like`
FROM `feedback`
GROUP BY `page` asc
LIMIT 10";

while($row = mysql_fetch_assoc($sql))
{
$results[] = $row;
}

return $results;
}

This doesn't work.  My error is "Warning: mysql_fetch_assoc() expects parameter 1 to be resource, string given in /blah.inc.php on line 105 ".

Code: [Select]
<?php

$results = fetch_feedback_best();

foreach ($results as $result)
{
?>
echo $result['page'];
}

?>

Hi all   Is it possible to have a function with two parameters but and then check if one is passed before using it.   In this code here I want to remove spaces and change to lowercase.   If the $extra parameter is set I want to add that to the end of the string.    

function className($nametoUse, $extra){

I'm fairly new to this and I have looked around but I can't find much information on it. Basically I know what an array and a function is but I'm currently working through an oop login and register sytem and I am seeing this quite a lot:   function myFunction($myVariable = array()){   $Firstvariable = $myVariable[0]; $Secondvariable = $myVariable[1];   //etc   }   This is really confusing me and I can't see any examples in any tutorial sites or books of an array and a function being used like this. Can someone just explain how something like this would work in simple terms? I have also checked the manual but I can't see an example an array being used like this. Any help would be much appreciated. Thanks.

hello
how do i pass a value from 1 function to another

i want to use this part

Code: [Select]
//send the list order to the navigation or list page
$PHL = PhLists::by_listNo($PHGlno);
foreach ($PHL as $PHLs){
$PHLlno = $PHLs->phList_No;
$PHLorb = $PHLs->orderBy;
$PHLord = $PHLs->orderDir;
}


from this very long function.


Code: [Select]

function include_placeHolders($position, $phNo, $pageID){

$langBS = basicSettings::find_by_id(1);
$langID = $langBS->language_id; 

//FIND PLACEHOLDER BY ID
$PH = Placeholders::find_by_pageID($pageID);
foreach ($PH as $PHs){
$PHpos = $PHs->position;
$PHnum = $PHs->phNumber;
$PHgNo = $PHs->phGroup_No;
$PHgFx = $PHs->PHGfx_id;
$PHgThm = $PHs->PHGtheme_id;

if($phNo == $PHnum && $position == $PHpos){

//FIND ELEMENT THEMES
echo '<style type="text/css" media="screen">';
include(PAGES.DS."phGroups".DS."theme{$PHgThm}".DS."css".DS."styles.css");
echo '</style>';

echo'<div id="PHgroup">';

//FIND GROUPS BY phGroupNo
$PHGodr = PhGroups::find_order($PHgNo);
foreach ($PHGodr as $PHGodrs){
$PHGob = $PHGodrs->orderBy;
$PHGod = $PHGodrs->orderDir;
}

//FIND PHGROUPS BY BY GROUPno & ORDER
$PHG = PhGroups::find_by_order($PHgNo, $PHGob, $PHGod);
foreach ($PHG as $PHGs){
$PHGid = $PHGs->id;
$PHGname = $PHGs->name;
$PHGgno = $PHGs->phGroup_No;
$PHGlno = $PHGs->list_No;
$PHGce = $PHGs->contElements_id;
$PHGpl = $PHGs->pageLink_id;
$extLink = $PHGs->extLink_id;
$PHfx = $PHGs->PHfx_id;
$PHthm = $PHGs->PHtheme_id;

//send the list order to the navigation or list page
$PHL = PhLists::by_listNo($PHGlno);
foreach ($PHL as $PHLs){
$PHLlno = $PHLs->phList_No;
$PHLorb = $PHLs->orderBy;
$PHLord = $PHLs->orderDir;
}


//FIND EXTERNAL LINK
$PHGeL = ExtLinks::find_link($extLink);
foreach($PHGeL as $PHGeLs){
$PHGurl = $PHGeLs->url;
$PHGtarget = $PHGeLs->target;
}

//FIND ELEMENTS
$CE = ContElements::find_by_phg($PHGce);
foreach ($CE as $CEs){
$CEeName = $CEs->name;
$CEetype = $CEs->elementTypes_id;
$CEefx = $CEs->elFx_id;
$CEethm = $CEs->elTheme_id;

//FIND ELEMENT TYPE NAME
$CEt = ElementsTypes::find_Etype($CEetype);
foreach ($CEt as $CEts){
$CEtName = $CEts->name;

//FIND PLACEHOLDER THEMES
echo '<style type="text/css" media="screen">';
include(PAGES.DS."placeHolders".DS."theme{$PHthm}".DS."css".DS."styles.css");
echo '</style>';


//FIND ELEMENT THEMES
echo '<style type="text/css" media="screen">';
include(ELEMENTS.DS."{$CEtName}".DS."themes".DS."theme{$CEethm}".DS."css".DS."styles.css");
echo '</style>';


//FIND INTERNAL OR EXTERNAL LINK
$pageLNK = (empty($PHGpl)) ? '' : '<a href="index.php?pageID='.$PHGpl.'">';
$extLNK = (empty($extLink)) ? '' : '<a href="'.$PHGurl.'" target="'.$PHGtarget.'">';
$ENDpageLNK = (empty($PHGpl)) ? '' : '</a>';
$ENDextLNK = (empty($extLink)) ? '' : '</a>';


echo $pageLNK;
echo $extLNK;
echo'<div id="ph">
<div id="PHelement">';
include(ELEMENTS.DS."{$CEtName}".DS."{$CEeName}.php");
echo'</div></div>';
echo $ENDpageLNK;
echo $ENDextLNK;
}
}
}
echo'</div>';
}
}
}


i want the next long function to use these values

Quote

$PHLlno = $PHLs->phList_No;   
$PHLorb = $PHLs->orderBy;
$PHLord = $PHLs->orderDir;



this is where i want to use them in the next function
Quote

$nH = PhLists::navOrder($PHLlno, $PHLorb, $PHLord);



Code: [Select]
function nav(&$navLink){

$nH = PhLists::navOrder($PHLlno, $PHLorb, $PHLord);
foreach ($nH as $nHs){
$nav_typ = $nHs->type;
$nav_lvl = $nHs->levels;
$nav_pLnk = $nHs->pageLink_id;
$nav_eLnk = $nHs->extLink_id;
$nav_tType = $nHs->titleType;
$nav_ctBid = $nHs->custTxtBridge_id;


//INTERNAL LINKS
if($nav_typ == "Internal"){

//USE SET TITLE
if($nav_tType == "SetTitle"){

$navPage = Pages::findNav($nav_pLnk);
foreach ($navPage as $navPages){
$NPbid = $navPages->PCbridge_id;
}
$STBhead = PCbridge::find_setTitle($NPbid, $langID);
foreach ($STBhead as $STBheads){
$text = $STBheads->pageContent_id;
}
$navText = PageContent::find_text($text); 
foreach ($navText as $navTexts){
$navLink = $navTexts->title;
}


//USE CUSTOM TITLE
}else if($nav_tType == "Custom"){

$CTBhead = PCbridge::find_customTitle($nav_ctBid, $langID);
foreach ($CTBhead as $CTBheads){
$text = $CTBheads->pageContent_id;
}
$navText = PageContent::find_text($text); 
foreach ($navText as $navTexts){
$navLink = $navTexts->title;
}
}
}

//EXTERNAL LINKS
if($nav_typ == "External"){

//USE SET TITLE
if($nav_tType == "SetTitle"){

$navExt = ExtLinks::findNav($nav_eLnk);
foreach ($navExt as $navExts){
$navLink = $navExts->name;
$PHGurl = $navExts->url;
$PHGtarget = $navExts->target;
}


//USE CUSTOM TITLE
}else if($nav_tType == "Custom"){

$navExt = ExtLinks::findNav($nav_eLnk);
foreach ($navExt as $navExts){
$PHGurl = $navExts->url;
$PHGtarget = $navExts->target;
}
$CTBhead = PCbridge::find_customTitle($nav_ctBid, $langID);
foreach ($CTBhead as $CTBheads){
$text = $CTBheads->pageContent_id;
}
$navText = PageContent::find_text($text); 
foreach ($navText as $navTexts){
$navLink = $navTexts->title;
}
}
}


//NO LINK
if($nav_typ == "Non"){

//USE CUSTOM TITLE
if($nav_tType == "Custom"){

$CTBhead = PCbridge::find_customTitle($nav_ctBid, $langID);
foreach ($CTBhead as $CTBheads){
$text = $CTBheads->pageContent_id;
}
$navText = PageContent::find_text($text); 
foreach ($navText as $navTexts){
$navLink = $navTexts->title;
}
}
}
}
}


thanks

Cant seem to figure this one out for a chained script.

In the code below I need to take the value of  $drop_var from function drop_1()
and send it to function drop_2()
So I can add it to the Where clause to limit the results of the third box a little more.

But I cannot get the value to pass to the function.
Any help appreciated.
func.php
<?php
//**************************************
//     Page load dropdown results     //
//**************************************
function getTierOne()
{
$result = mysql_query("SELECT DISTINCT branch FROM rank") 
or die(mysql_error());

  while($tier = mysql_fetch_array( $result )) 
  
{
   
   echo '<option value="'.$tier['branch'].'">'.$tier['branch'].'</option>';
}

}

//**************************************
//     First selection results     //
//**************************************
if($_GET['func'] == "drop_1" && isset($_GET['func'])) { 
   drop_1($_GET['drop_var']); 
}

function drop_1($drop_var)
{  

include_once('db.php');
$result = mysql_query("SELECT DISTINCT type FROM rank WHERE branch='$drop_var'") 
or die(mysql_error());

echo '<select name="drop_2" id="drop_2">
      <option value=" " disabled="disabled" selected="selected">Choose one</option>';

   while($drop_2 = mysql_fetch_array( $result )) 
{
  echo '<option value="'.$drop_2['type'].'">'.$drop_2['type'].'</option>';
}

echo '</select>';
echo "<script type=\"text/javascript\">
$('#wait_2').hide();
$('#drop_2').change(function(){
  $('#wait_2').show();
  $('#result_2').hide();
      $.get(\"func.php\", {
func: \"drop_2\",
drop_var2: $('#drop_2').val()
      }, function(response){
        $('#result_2').fadeOut();
        setTimeout(\"finishAjax_tier_three('result_2', '\"+escape(response)+\"')\", 400);
      });
     return false;
});
</script>";
}


//**************************************
//     Second selection results     //
//**************************************
if($_GET['func'] == "drop_2" && isset($_GET['func'])) { 
   
   drop_2($_GET['drop_var2']);
   
}

function drop_2($drop_var2)
{  


echo "<br>($drop_var)<br>"; 
    

include_once('db.php');
$result = mysql_query("SELECT * FROM rank WHERE type='$drop_var2'") 
or die(mysql_error());

echo '<select name="drop_3" id="drop_3">
      <option value=" " disabled="disabled" selected="selected">Choose one</option>';

   while($drop_3 = mysql_fetch_array( $result )) 
{
  echo '<option value="'.$drop_3['grade'].'">'.$drop_3['grade'].'</option>';
}

echo '</select>';
    echo '<input type="submit" name="submit" value="Submit" />';
}
?>
index.php
<?php 
  include('db.php');
  include('func.php');
?><!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>Chained Select Boxes using PHP, MySQL and jQuery</title>
<script type="text/javascript" src="http://ajax.googleapis.com/ajax/libs/jquery/1.3/jquery.min.js"></script>

<script type="text/javascript">
$(document).ready(function() {
$('#wait_1').hide();
$('#drop_1').change(function(){
  $('#wait_1').show();
  $('#result_1').hide();
      $.get("func.php", {
func: "drop_1",
drop_var: $('#drop_1').val()
      }, function(response){
        $('#result_1').fadeOut();
        setTimeout("finishAjax('result_1', '"+escape(response)+"')", 400);
      });
     return false;
});
});

function finishAjax(id, response) {
  $('#wait_1').hide();
  $('#'+id).html(unescape(response));
  $('#'+id).fadeIn();
}
function finishAjax_tier_three(id, response) {
  $('#wait_2').hide();
  $('#'+id).html(unescape(response));
  $('#'+id).fadeIn();
}
</script>
</head>

<body>
<p>
<form action="" method="post">
  
    <select name="drop_1" id="drop_1">
    
      <option value="" selected="selected" disabled="disabled">Select a Category</option>
      
      <?php getTierOne(); ?>
    
    </select> 
    
    <span id="wait_1" style="display: none;">
    <img alt="Please Wait" src="ajax-loader.gif"/>
    </span>
    <span id="result_1" style="display: none;"></span>
    <span id="wait_2" style="display: none;">
    <img alt="Please Wait" src="ajax-loader.gif"/>
    </span>
    <span id="result_2" style="display: none;"></span> 
  
</form>
</p>
<p>
<?php if(isset($_POST['submit'])){
$drop = $_POST['drop_1'];
$drop_2 = $_POST['drop_2'];
$drop_3 = $_POST['drop_3'];
echo "You selected a ";
echo $drop_3." ".$drop." ".$drop_2;
}
?>
</body>
</html>

HI, i'm using a class to create a database connection etc.. So I have something like this in a common.inc.php file which is include in each page $db_numbers_args = array();
$db_numbers_args['host'] = "localhost";
$db_numbers_args['user'] = "puser";
$db_numbers_args['pass'] = "nuser";
$db_numbers_args['db']   = "nu_name";
$db_numbers = new db($db_numbers_args,TRUE);   From there I can end up making query's like $res = $db_numbers->query($uqs);   So that said i'm including another file that contains all functions, when  the functions need to do database transactions I always need to put $db_numbers as a paramter to the function and each function I make.. How should I make this better ?    

how do i enable exec() in php.ini? where is php.ini? cant find it in the directories in my site.

Hey guys,

OK, heres what I would like to do.  On my form, I have 50+ variables and not all of them require a response.  If inserted, they insert a blank in the DB, instead of NULL.  First, does this even matter?

If it does, how can I create a function that checks the var to see if its empty, and if empty $var = NULL;

Thanks

Hi All,

I have a function that i want to pass a variable into so that i can do some SQL on it.

The information that i want to pass into it is a data-id on a button that is used to trigger the function.

The button that will be clicked is this

<div class='modaltrigger btn btn-primary' data-id='$itemId' data-toggle='modal'>Manage</div>

This button is being created by another function.

I would like to know either how i pass the variable from one function to another or how i pass it from the data-id to the function in php.

Thanks in advance.

Hi guys,

I have a trouble with my php snippet, when I insert the var function in the url bar something is like:

http://www.mysite.com/delete.php?favorites&id=0

or

http://www.mysite.com/delete.php?whateveritis&id=0

It doesn't get pass the favorites function to delete the id. It is the same things that it goes for each different function.

Here's the current code:

<?php
Code: [Select]
session_start();
    define('DB_HOST', 'localhost');
    define('DB_USER', 'mydbuser');
    define('DB_PASSWORD', 'mydbpass');
    define('DB_DATABASE', 'mydbtablename');

    $errmsg_arr = array();
    $errflag = false;

    $link = mysql_connect(DB_HOST, DB_USER, DB_PASSWORD);
    if(!$link) {
  die('Failed to connect to server: ' . mysql_error());
    }

    $db = mysql_select_db(DB_DATABASE);
    if(!$db) {

die("Unable to select database");
    }

   function clean($var){

return mysql_real_escape_string(strip_tags($var));
    }
    $favorites = clean($_GET['favorites']);
    $id = clean($_GET['id']);

if($favorites && $id == ''){
   // both are empty
   $errmsg_arr[] = 'favorites id are missing.';
   $errflag = true;
}

    if($errflag) {
  $_SESSION['ERRMSG_ARR'] = $errmsg_arr;
  echo implode('<br />',$errmsg_arr);
   }
   else {
$insert = array();
if(isset($_GET['id'])) {
    $insert[] = 'id = \'' . clean($_GET['id']) .'\'';
}
if(isset($_GET['favorites'])) {
    $insert[] = 'favorites = \'' . clean($_GET['favorites']) . '\'';
}

if($favorites && $id) {
   mysql_query("DELETE FROM favorites WHERE id='$id'");
   $deleted = mysql_affected_rows();
   if($deleted > 0)
   {
  echo "favorites channels is deleted";
   }
   else
   {
  echo("favorites is already deleted");
   }
 }
}
?>
If you do know how to get pass the favorites function, then please say so as i need your help.

Any advice would be much appreicated.

Hi,

Im trying to pass a variable ($in_this_instance) into, and then back out of a function.  The variable goes into the function no problem, and is echo'ed out fine.  However the echo after the close of the function, does not give anything out. 

Code: [Select]
$in_this_instance = 'boo';

function in_this_instance($data) {
global $in_this_instance;

echo $in_this_instance;

$in_this_instance = 'hoo';


$rep_val = '[front banner]';

    $test = strpos($data, $rep_val);
    if ($test === false) {
return $data;
    } else {
    return $data;;
    }
}

add_filter('the_content', 'in_this_instance');
echo $in_this_instance;

Could any one give me a pointer please?  Many Thanks!

Kindly let me know how can i assign values to a php function from any textbox when user clicks on the submit button???


Code: [Select]
<form action="welcome.php" method="post">
Name: <input type="text" name="fname" />
<input type="submit" />
</form>

One more question. So I have a function with two parameters, $x and $y. Here it is.

Code: [Select]
function dydx($x,$y){

$equation = 2 * $x;
return $equation;
}
Now here's the problem. I want $equation to be user defined. Easy enough, I use a post command and I get $equation to equal whatever the user inputs. The problem is that if I get input from the user, I'm not sure how to take that input and then have the function parameters work on it. Like if the user inputs "3*$x + 2*$y", i want to be able to let the parameters for the function dydx act on it. How could I go about doing this?