so I am trying to figure out a way with php to say if a users rank is the highest, then put a picture next to their name. I can do it for a specific user but I am not sure how to do it for the highest rank
<td>
<?php if($r->rank=='3') {
echo '<img src="image.jpg">';
}?>
</td>
Well first of all you have to determine what the highest rank is so it will start like
I'm assuming you want one star per user thats on the page or something of sorts
$star_given = false;
foreach($foo as $bar) {
echo "<tr><td>";
echo ($star_given===false ? $bar->rank >= 3 ? : "<div style='background: url(img/foo.png) no-repeat' : " ");
echo "</td>
}
This is not catering for if more than one person has the highest rating though e.g
$personA->rank = 3;
$personB->rank = 2;
$personC->rank = 3;
in this case you would just remove the $star_given property and just let it check for the rank
edit
Sorry seem to have to misunderstood your question;
You would simply add a variable called
$highest_rating=0;
Before the loop. Then when someone becomes the highest rating you simply go like $highest_rating = $r->rank. Then after the Loop you can echo the highest Rating , or alternitavly you can use JS for this.
Here is a small script showing you how to access tables
JSBIN
Related
I have been trying to get my head around how to approach this problem. I am writing a web page book library with the categories ('nodes') as MySQL records. I want to print the list of categories at each level, starting at the highest level, and then allow the user to select a category to travel deeper into the library. The PHP codes runs a saved procedure in MySQL:
//loop the result set
while ($row = mysqli_fetch_array($result)) {
if ($row[1] <> 0) {
echo $row[0];
echo "<br />";
} else { // the first row is just the heading
"</strong>Category: ";
echo $row[0];
echo " : <br />";
}}
Because there are only two test categories, this produces output:
Books :
Nature
Children's Books
However, I want to be able to create an onclick event over 'Nature' and 'Children's Books' so the user can select a category and drill down t the next level via a php function. I can convert the php output into html eg:
<?= "<p>{$row[0]}</p>" ?>
but I can't see how I can identify the row in an onclick event to pass a parameter to the function. Perhaps I need to have a completely different approach?
Add an onclick attribute to the element that calls a JavaScript function that does what you want.
<?= "<p onclick='someFunc({$row['id']})'>{$row[0]}</p>" ?>
Replace id with the actual name of the column containing the ID of the row in the table. someFunc() can use that ID to look up information in an array or object, or send an AJAX request.
I have a textbox and a button that puts whatever you just typed into a database, then I have this to display all those things, along with a delete button and a "top" button
<?php
$resultset2 = $db3->query('SELECT * FROM ask');
if($resultset2->num_rows != 0) {
while ($rows = $resultset2->fetch_assoc()) {
$question_enter = $rows['question'];
$id = $rows['id'];
echo "<form action='' method='post'><input type='hidden' value='".$id."'
name='the_id'><div><p>$question_enter<input type='submit' value='Delete'
name='deletedefaultnote'><input type='submit' value='Top' name='putontop'>
</p></div></form>";
}
} else {
echo 'no results.';
}
?>
I have the delete button working, but I can't figure out how to get the "top" button to put an element on the top of the list that's being displayed. How should I do this?
If it's relevant, say item1 and item2 are on the bottom of a long list, if I put item1 on top of the list, then put item2 on top, item2 would be on top and item1 would be second on the list. I don't want the elements to return to their original position if something else goes on top.
To store the new ordering into database you have to update all positions. One simple approach would be to use a "position" column like sym mentioned.
With an position-column beginning with 1 (0 is the "guardian") you could then
update the "new top" item and set the position to 0 (guardian) after that you would have to update ALL items/rows and set the position to old_position+1.
As you can see this approach is heavy on queries so I would recommend not to update the table every time you click on your "top" button and instead order the items on frontend with something like jQuery (what Kuya) said and after you're done re-ordering your list save it in one big request with the method explained above.
UPDATE: To update the rows in your database you can also use a single query when so following conditions are met:
column position starts at 1 and is NOT unique
the new top position item's position was set to 0
Then you can simply do UPDATE tablename SET position = position + 1. The database will then automatically increment all position values (and position 0, the guardian will be available again).
I have bits of code I want to throw in to my site, and provisioned a space right after <body> using 'flairs' (divs) that sit outside the design. Here's the code:
//Add Flair Containers as needed
if($flairs>0){
echo "<!--Flair Graphics (if needed)-->\n";
while($fQty = --$flairs+1){ //-- subracts 1, +1 accounts for 1 being 0
$flair = array($flair1, $flair2, $flair3);
foreach($flair as $flairCode){
echo "<div id=\"flair-".$fQty++."\">".$flairCode."</div>\n";
};
};
};
It prints correctly, where content = $flair1, $flair2, and so on.
<div id="flair-1">Content1</div>
<div id="flair-2">Content2</div>
<div id="flair-3">Content3</div>
But if $flair2/$flair3 is empty, it still prints a div. How can I fix this?
Within your foreach loop you can check if the value is empty and continue (i.e. skip) to the next value if it is.
Like so:
if($flairs>0){
echo "<!--Flair Graphics (if needed)-->\n";
while($fQty = --$flairs+1){ //-- subracts 1, +1 accounts for 1 being 0
$flair = array($flair1, $flair2, $flair3);
foreach($flair as $flairCode){
if (empty($flairCode)) continue;
echo "<div id=\"flair-".$fQty++."\">".$flairCode."</div>\n";
};
};
};
I suspect that you could simply prepend if($flairCode) to your echo statement. That would make your inner loop:
foreach($flair as $flairCode){
if($flairCode) echo "<div id=\"flair-".$fQty++."\">".$flairCode."</div>\n";
};
Some points to note:
Since the $flair array will always be the same, construct it outside of the loop (this will let you evaluate the condition only once too.
Using $fQty++ is not enough to guarantee unique ID's, especially since every time it hits the while the value is reset. I suggest $fQty should not be part of the while condition and simply stay as an independent tally.
Stop using double-quotes. They're slow.
I got an XML file being echoed by PHP and all the code works fine but my problem is that inside a tag (exam and the attribute is chapter which is what's being echoed) there's more than one tag (ex, that's what is being echoed as exam #) and I am echoing the data to a table and I want it to display it like this:
| Chapter 1 | Chapter 2 |
|--Exam 1---|--Exam 1---|
|--Exam 2---|--Exam 2---|
| Chapter 3 | Chapter 4 |
|--Exam 1---|--Exam 1---|
But What I am getting is something like this: (I know why though)
| Chapter 1 |
|--Exam 1---|
| Chapter 1 |
|--Exam 2---|
| Chapter 2 |
|--Exam 1---|
It keeps on repeating the tag's attribute and I know why, because I am echoing the tag's attribute that I have as a variable in a table data. So the question is not why it is happening but how can I change it to display it the way I want it.
I guess maybe there's a way to delete the attribute if there's more than one (I know you can delete it but I don't know how to show it once and delete the others)
The code that I have is something like this:
In XML
<maintag>
<exam chapter="Chapter 1">
<ex id="1">Exam 1</ex>
<ex id="2">Exam 2</ex>
<ex id="3">Exam 3</ex>
</exam>
<exam chapter="Chapter 2">
<ex id="4">Exam 1</ex>
<ex id="5">Exam 2</ex>
</exam>
<exam chapter="Chapter 3">
<ex id="6">Exam 1</ex>
</exam>
<exam chapter="Chapter 4">
<ex id="7">Exam 1</ex>
<ex id="8">Exam 2</ex>
<ex id="9">Exam 3</ex>
<ex id="10">Exam 4</ex>
</exam>
</maintag>
The PHP
<?php
$xml = DOMDocument::load('examdata.xml');
$xpath = new DOMXPath($xml);
$exams = $xpath->query('//exam/ex');
$istyle = 1; //This is to add gray after every other row
echo " <table cellpadding=\"0\" cellspacing=\"3\" border=\"0\" width=\"60%\" align=\"center\">
<tr id=\"center\" bgcolor=\"#999\">
<td>Book</td>
<td>Exam</td>
<td>ID</td>
<td>Student's Exam Status</td>
</tr>
";
foreach($exams as $exams2) {
$chapter = $exams2->parentNode->getAttribute('chapter');
$examid = $exams2->getAttribute('id');
$examname = $exams2->nodeValue;
if ($examid < 5) { //where it says 5 there goes a php variable where it has the queried user's exam number from the database, again this is all finished no need to change this.
$exstatus = "You already took this exam.";
}elseif ($examid == 5) {
$exstatus = "This is your exam (exam link)";
}elseif ($examid > 5) {
$exstatus = "You are not yet on this exam";
}
echo "<tr id=\"center\"";
if ($istyle % 2 == 0)
echo " bgcolor=\"#ccc\"";
echo ">
<td>$chapter</td>
<td>$examname</td>
<td>$examid</td>
<td>$exstatus</td>
</tr>";
$istyle++;
}
echo "
</table>";
?>
Notice that the table structure is different than the way I said I want it and I was getting it above, I just changed it because I couldn't leave it the way it was.
Note that what I want to change is where it says chapter, I want it to display it once and below it to display exam 1 and below that exam2 ect. and next to the chapter put the next chapter (in this case chapter 2) and below that exam 1 and below that exam 2 ect. and after that create another table row below exam 2 and put two other chapters and below that the other exams.
Notice that the exams do not follow a pattern and this is an edited version of the file since there's hundreds of those and the values are different of what you see above.
The code above works, I just want to modify it so it could meet my requirements.
I've figured it out, it took me hours but I finally did it.
This is the code I used for the PHP, the XML stayed the same. I'll try to be as detailed as possible so it could help anyone with a similar problem or so they could extract info from it and modify it to their needs.
<?php
//self explanatory
$xml = DOMDocument::load('examdata.xml');
//again, self explanatory
$xpath = new DOMXPath($xml);
//looks for ex under exam in the xml I loaded above xml
$exams = $xpath->query('//exam/ex');
//I just put a number for testing purposes but it actually gets the user's exam id from the database
$studentexnum = "5";
//column counter, will be used to tell that after every 2 chapters, break the table data (td) and table row (tr) and create a new one
$_2chapters = 1;
//Opens the table and displays it to the client
echo "<table cellpadding=\"5\" cellspacing=\"5\" border=\"0\" width=\"25%\" align=\"center\">
<tr>"; //Opens the first table row and end the echoing
//starts the loop, for every exam, makes exam2 same as exam
foreach($exams as $exams2) {
//looks at my xml file for the tag ex (what I defined above) and gets the attribute called chapter from his parent (the tag above it)
$chapter = $exams2->parentNode->getAttribute('chapter');
//gets the attribute called id from the tag ex
$examid = $exams2->getAttribute('id');
//makes the tag ex a string so we could display it
$examname = $exams2->nodeValue;
////////////////////////////////////////Now for the Fun Part/////////////////////////////////////////////////////////////////////////////////
//conditional statement saying that if the variable chapter2 is set, display the conditions below, if it's not set (which is not when its starts the loop) do something else
if (isset($chapter2)){
//says if variable chapter defined above is equal to variable chapter 2 which is defined below do something. This is not true the first time but it is the rest of the loop, even is is a million.
if ($chapter == $chapter2) {
//variable chaptertd (which is called below) will equal to nothing if chapter equals to chapter2, this will happen at every exam (every ex tag in my xml file which is in the question above)
//this will avoid having repeated chapter, ie: chapter1 - exam one, chapter1 - exam 2, chapter1 exam 3, ect. will make it chapter 1, exam 1, exam 2, exam 3, ect
$chaptertd = "";
//if chapter does not equal to chapter2
}else {
//here we increment variable _2chapters that was 1 above, now is two, this is necessary so it could display two chapters side by side and break right before the third chapter, this will happen later
$_2chapters++;
$chapter2 = $chapter; //THIS PART IS EDITED, BUT NECESSARY
//Now we give a value to variable chaptertd, it was nothing before because I didn't want to repeat the title every time the loop found a new tag ex from my xml. This will only happen once in every chapter
$chaptertd = "
</td>
<td align=\"center\" valign=\"top\">$chapter2";//here we create the html that variable chaptertd will be displaying after a new name from the attribute chapter is found. This will display the name of the chapter to our table
}
//this else will only happen the first time the loop runs since only the first time is when the variable chapter2 is not defined, after this runs the variable chapter2 will have been defined
}else {
//chapter2 will be the same as chapter, if chapter equals to the string chapter1 so will chapter2.
$chapter2 = $chapter;
//here we create the same td as above since we want to display the name of the chapter the fist time it runs, if we don't do this the first chapter won't be display to the client
$chaptertd = "
<td align=\"center\" valign=\"top\">$chapter2";
}
//This part you don't have to concern yourself with it, I made this because I needed it to display different info depending whether the user was allow to see that exam.
//the variable examval is defined outside this code, that's on my html code which would do nothing here since it uses javascript and css. this gets the attribute id from our ex tag.
if ($examid < $studentexnum) {
$exval = "lessthan";
}elseif ($examid == 5) {
$exval = "equalto";
}elseif ($examid > 5) {
$exval = "greaterthan";
}
//here we say what happens when the variable _2chapters reaches the third attribute called chapter. we say if the remainder of variable _2chapters divided by 3 equals 0 do something
//else do nothing since we didn't define the else because we didn't needed it. this part will only happen at every third chapter, it will break from the previous chapter thus making
//it a new row right under the values of the tag ex which is under chapter 1 the third time the loops runs, but this will happen infinite amounts of time, after that it will be under
//chapter 3 and after that chapter 5 and so on.
if ($_2chapters % 3 == 0) {
//here we reset the count back to one because if we don't and there's more than one tag ex under chapter 3, it will be braking after every ex
$_2chapters = 1;
//here we echo the break from the previous chapter
echo "
</td>
</tr>
<tr id=\"center\">";
}
//here we echo the variable chaptertd which we gave different values to above depending whether the chapter's name has been declared already or not. If it has been declared, chaptertd
//won't show anything, if the chapter has never been declared it will create a new td and display the chapter's name and after that it will become nothing again
echo "$chaptertd<br />
$examname";//here we show the client what's the name of the exams under the given chapter, there could be one or one hundred of this and it will only display the chapter once and will display the rest
//of the exam names one after the other
//here we say that chapter2 equals to chapter, this way chapter2 will equal to the name of that loop, if the next time it repeats there's a new chapter the value of chapter will change
//thus making this statement false above and that will force it to create a new td with the new name until another name appears.
$chapter2 = $chapter;
}
//close the table to have a well formatted html file to display to the client.
echo "
</td>
</tr>
</table>";
?>
I actually figured it out a while ago, but this "smart forum" doesn't allow me to answer my OWN question before 8 hours because I don't have enough points or something. It's like as if it was trying to say that because I am new here I am dumb and can't find the solution to my problem on my own inside 8 hours. So I went to sleep. I just wanted to help other people that might come to this post in the future and hopefully the answer would answer some of their questions.
You probably meant...
foreach($exams as $exam)
...to get an item from the array, instead of...
foreach($exams as $exams)
BTW i would think of other names for the variables exam and ex, use names that describes what they are, maybe exam and chapter.
i am having a hard time wrapping my head around how to do this... i have a select menu i want to display as default and a different one(s) if certain items appear in a shopping cart.
so say i sell dogs and cars. in the cart i have selected one of each. i want one select menu to appear if there are ever any cars in the cart. but if there are ever any dogs in the cart or cats for that matter i want a different select with different options to appear. so car_select would be the default if anything is in the cart...(i sell a lot of stuff) but if a dog appears in the cart then dog_select would replace it.
the way it is written now. the default is the last thing and that is what shows.
(see my comments)
so the code:
<?php
foreach($this->rows as $i => $row){
if (strstr('dogs',$row->dates)) {
$mydates = 'dogs';
} else {$mydates='default';}
//echo $row->dates; this spits out the correct values dogcar
}
//echo $mydates; with a dog and a car in the cart this returns default
//below functions i believe but i think the above is faulty
?>
<?php
if ($mydates =='dogs'){
//do something here;} else {
$type = $this->type;
foreach($this->extraFields[$type] as $fieldName => $oneExtraField) {
if ($fieldName != 'pickupdate-rosh'){; ?>
<tr class="hikashop_checkout_<?php echo $fieldName;?>_line">
<td class="key">
<?php echo $this->fieldsClass->getFieldName($oneExtraField);?>
</td>
<td>
<?php
echo $this->fieldsClass->display($oneExtraField,$this->$type->$fieldName,'data['.$type.']['.$fieldName.']');
?>
</td>
</tr>
<?php } ?>
<?php } ?>
<?php } ?>
i would like to always return car_select unless the presence of dogs or cats etc in the cart.
{edit: i just realized that is not the correct function to use to look for a string.}
It looks like you're setting $mydates, then overriding it (potentially). This is because you're setting one variable to one result for all iterations of your foreach loop, and the last iteration will be what the final variable value will be.
So set $mydates to a default and then change it if the condition is right.
$mydates='default';
foreach($this->rows as $i => $row){
if (strstr('dogs',$row->dates)) {
$mydates = 'dogs';
}
//echo $row->dates; this spits out the correct values dogcar
}