chanigng color of rowx in table - php

hello i am working on the styling of table in PHP . I am stuck at only one point that i am not able to to change the colors of the rows of my table alternatively like odd rows should be displayed with white background and even with blue . i trie the followng css code but it didnot worked
tbody:nth-child(2n) { /* even rows */
background-color:#eee;
}
tbody:nth-child(2n+1) { /* odd rows */
background-color:#ccc;
}

If it is not because of your browser issue, please try this for css
table#tableid tr:nth-child(2n) { /* even rows */
background-color:#eee;
}
table#tableid tr:nth-child(2n+1) { /* odd rows */
background-color:#ccc;
}
OR
table#tableid tr:nth-child(even) { /* even rows */
background-color:#eee;
}
table#tableid tr:nth-child(odd) { /* odd rows */
background-color:#ccc;
}

i think jquery :even and :odd selector is the best option for cross browsers..
$('#selector:even').addClass('even_class');
$('#selector:odd').addClass('odd_class');

Write two classes to for the styles of odd and even rows. And add the class alternately like this.
.odd_row{
background-color:grey;
}
.even_row{
background-color:white;
}
And in php,
<?php
for($i=0;$i<10;$i++)
{?>
<tr class="<?php echp ($i%2==0)?'odd_row':'even_row';?>">
<td>data1</td>
<td>data2</td>
</tr>
<?php
}
?>

Perhaps you could try using a variable to change which style is used. So when you start the block, you define oddOrEven as 0, then you echo a row, then you set oddOrEven to 1. Every time a row is echoed, it changes which class is used based on oddOrEven.

Related

mPDF page breaking too early in <tbody>

I have a mPDF output that essentially includes a table that is page-breaking in an unfortunate place.
The table is made up of a thead section, followed by several tbody's that each have a group-header row followed by detail rows - but the page break is leaving the group-header-row "orphaned" (or is it "widowed"). The problem isn't so much that the table is being broken, it's that it's only showing one row in the group before breaking.
Initially I thought of putting in page-break-inside:avoid on the css for the tbody, but this does not work (it "works" on the table but not on the tbody).
Another option would be to break each section into their own table, but this would lead onto column width inconsistencies that I would like to avoid.
Is there a way to stop mPDF from leaving too few widows/orphans? (I want to have at least two (or three) rows of each tbody showing but it would be nice to set this as an option**).
<?php
include_once('MPDF56_1/mpdf.php');
class Test {
public function doTest() {
$css=/**#lang CSS */"
table {
width:100%;
border:solid 1px grey;
}
th, td {
text-align:left;
padding:4px;
}
th {
background-color:#d1dce1;
}
.grouphead {
background-color:#e2e2e2;
}
";
$table="<table>";
$table.="<thead>";
$table.="<tr><th>Some header</th></tr>";
$table.="</thead>";
for($tb=1; $tb<=3; $tb++) {
$table .= "<tbody>";
$table.="<tr><td class='grouphead'>Group $tb Header</td></tr>";
for ($i = 1; $i < 34; $i++) {
$table .= "<tr><td class='detail'>Some data $tb.$i</td></tr>";
}
$table.="</tbody>";
}
$table.="</table>";
$head="<head><style>$css</style></head>";
$body="<body>$table</body>";
$mpdf = new mPDF('', 'A4');
$mpdf->WriteHTML("<html>$head$body</html>");
$mpdf->Output();
}
}
$try = new Test();
echo $try->doTest();
?>
(I'm using PHP7 & mPDF5.6 currently but can upgrade if newer versions have this function)
** e.g. ;

PHP <Style> change background color of div

I have a variable with a score and I'm having php change the color of a div element based on this variable. This if statement is always resolving to True. Anyone see the flaw?
<style>
.poster{
background-color:<?php
if($voteRating > 80.0){
echo "#2ecc71;";
}
else{
echo "#f1c42c;";
}
?>
}
.year{
color:;
}
</style>
Personally, I would create two CSS classes and echo an appropriate class name on the element instead.
if($voteRating < 80)
{
echo "<div class='one-class'>";
}
else
{
echo "<div class='another-class'>";
}
Or, considering this is more of front-end thing, maybe use ajax to determine the $voteRating and then change the style with javascript. Just some alternatives.
Nothing wrong with code. Try echoing $voteRanking to see if it gives more then 80.0
try something like this:-
<style>
.poster{
background-color:<?php echo ($voteRating > ceil(80.0)) ? "#2ecc71;" : "#f1c42c;"; ?>
}
.year{
color:;
}
</style>
You should create different classes for each color and then use javascript or php conditions to set the class upon page rendering or any other event triggering. This way its easy to debug issues with your code.
for example
<style>
.posterhigh{
background: #2ecc71;
}
.posterlow {
background: #f1c42c;
}
</style>

Select multiple divs and change their backgrounds

I am creating multiple divs in a loop in php shown below.
<?php
for ($i=0; $i<=9; $i++)
{
for ($j=0; $j<=9; $j++)
{
echo "<div class=\"bg\" id=\"aaa".$i."\" style=\" position:absolute;top:".($i*10)."%;left:".($j*10)."%;\">
</div>";
}
}
?>
i want to select multiple divs (not all) and change their backgrounds using jquery. i cant seem to be able to figure out how to proceed with this
You can select div with id starting with aaa
$('div[id^=aaa]')
if you want to select yhe div's based on their index, you could use the nth-of-type selector:
divs = $('.bg:nth-of-type(1)');
divs.css('background-color','blue');
You can select multiple elements by adding them to the variable:
divs.add('.bg:nth-of-type(2)').add('.bg:nth-of-type(3)');
Note that these are css selectors so it may be an idea to simply do this in css:
.bg:nth-of-type(1),
.bg:nth-of-type(2),
.bg:nth-of-type(3){
background-color: blue;
}
also note you can use an expression inside the brackets to represent multiple values in a sequence.
.bg:nth-of-type(3n+1){ //will select every fourth div
background-color: blue;
}
Unless you can come up with a better criteria for which div's you want to change, this is probably the best way.
Source(s)
jQuery API - .add()
MDN - CSS :nth-of-type selector
This should do the trick:
var arrayDivs = $('div[id^=aaa]');
$.each(arrayDivs, function(){
$(this).css('background-color', '#000');
});
If you want to select multiple lists and not all "aaa"+integer ones, you will need to either know the numbers of those or you need to differ within your loops already.
More information would be awesome!
The "proper" way (if you can say that) would be to group the elements you want to assign common properties with appropriate classes. You can then manipulate them via CSS
So in essense, while looping in the above code :
for ($i=0; $i<=9; $i++) {
for ($j=0; $j<=9; $j++) {
$classes = 'bg';
if( [somelogic] ) { $classes .= ' bluefront'; }
if( [otherlogic] ) { $classes .= ' greenback'; }
echo "<div class=\"".$classes."\" id=\"aaa".$i."\" style=\" position:absolute;top:".($i*10)."%;left:".($j*10)."%;\"></div>";
}
}
and then, via CSS :
.bg.bluefront { color: blue; }
.bg.greenback.bluefront { background-color: green; color: white; }
//select all elements with class bg and add background image
$('.bg').css('background-image',"url('some_image.gif')");
better yet use css:
.bg {
background-image: url('some_image.gif');
}
if you only want some divs from the class bg:
$('.bg').each(function(index,element){
//your code here eg:
if(index == 2)
alert(index);
});

Create a dynamic table-like grid without using tables

I am wondering if it's possible to create a grid-like layout using div's that are dynamically created using PHP.
I am creating a product page that will display all products in a PHP database. I want each product to be housed in a div, and 3 divs to display in a row with as many rows as needed to get through all the products.
Something like this:
div div div
$row['product1'] $row['product2'] $row['product3']
div div div
$row['product4'] $row['product5'] $row['product6']
I would prefer not to use a table. I know how to line divs up using the float and clear properties, but not if they are all being created in a while statement, which makes me think it might not be possible.
So I guess, is this possible without using tables, or should I just stick with that?
This can be done the way you ask, though it isn't the best way. It's entirely possible to identify the <div> positions within columns in a while loop:
// Looping over your results simplified...
$i = 1;
while ($results) {
if ($i % 3 == 1) {
$div_class = 'left';
}
else if ($i % 3 == 2) {
$div_class = 'middle';
}
else {
$div_class = 'right';
}
$i++;
// output, simplified
echo "<div class='$div_class'>$row_contents</div>";
}
Then use your CSS to float and clear as necessary for the left, middle, right classes.
.left, .middle, .right {
float: left;
}
.left { clear: left; }
.right { clear: right; }
However,
Given all of this, I still probably wouldn't bother with <div>s. Semantically if this is a list of products, you should be listing them in <li> tags. Then just style the <li> to float: left; and make each one 33% the width of the container so you get 3 per line.

Div not auto expanding due to dynamically loaded content

I have a bit of an issue...
Ive made a div, and normally, it expands to suit the height of its contents fine, however... Now i have a problem.
My content is being returned from a Sql statment, and its not expanding to suit its height, a working non dynamic version is
#commentblock {
min-height:50px;
width:90%;
margin:20px auto;
padding:10px;
border:1px solid #999;
}
My code is as follows (its in a for loop making a new div for each instance)
// Now lets query to grab the responses to this fault
$querytwo = "SELECT * FROM comments WHERE faultid=".$fid;
// execute query
$resulttwo = mysql_query($querytwo) or die ("Error in query: $querytwo. ".mysql_error());
// see if any rows were returned
if (mysql_num_rows($resulttwo) > 0) {
// print them one after another
while($row = mysql_fetch_row($resulttwo)) {
// lets make this render then
echo "<div id='commentblock'>";
echo "<div class='loggedby'>Logged By : <span>".$row[4]."</span><p class='contactno'>Entered : <span>".$row[3]."</span></p></div>";
echo "<div class='info'><span>".$row[2]."</span></div>";
echo "</div>";
}
}
// free result set memory
mysql_free_result($resulttwo);
// close connection
mysql_close($connection);
Thanks in advance :)
Got it, the content was in a span which was inheriting a floating attribute. Removed the float - now its all fine :)
It might not be to do with dynamic code, but invalid HTML.
You are using:
id='commentblock'
... in a loop, which create multiple, identical IDs on the same page, which is not valid.
You should change to:
class='commentblock'
and reference you CSS as:
.commentblock
... instead of:
#commentblock

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