I have the following script. It's making divs with the username on it, works fine until the href part, the php page opens with user=$user (the variable doesn't take it's value)
For example $user='george' in the div id and inside getElementById, but in href user=$user? why?
Thanks in advance,
<script>
$(document).ready(function(){
for(i = 0; i < 1; i++) {
$('body').append('<div id="div'+'<?php echo $user; ?>'+'"/>'); //$user='george'
document.getElementById('div'+'<?php echo $user; ?>'+'').innerHTML=
'<?php echo $user; //$user='george'
echo '<a href="account_show_to_members.php?user=$user"> //$user=$user WRONG
Visit!</a>'; ?> ';
}
});
</script>
The problem is that php wont process inline variables in a string with single quotes, nor escaped characters like \n. The first place you should start is changing this:
echo '<a href="account_show_to_members.php?user=$user"> //$user=$user WRONG
Visit!</a>';
to this:
echo "<a href='account_show_to_members.php?user=$user'>Visit!</a>";
definitely look into some formatting standards though, this code is kind of a mess.
EDIT: just for the sake of avoiding confusion, here's how it should look altogether:
<script>
$(document).ready(function(){
for(i = 0; i < 1; i++) {
$('body').append('<div id="div<?php echo $user; ?>"/>');
document.getElementById('div<?php echo $user; ?>').innerHTML = '<?php echo $user." Visit!"; ?>';
}
});
</script>
This can probably be written directly to the dom too, without passing it through javascript. Saves a lot of overhead and complication. Not trying to be a jerk, just giving friendly advice.
Related
I have the following PHP that returns records from a my MYSQL table. These records are displayed as LINKS. See code below...
<div class="slide1" id="u1026">
<?php while ($row = mysql_fetch_array($query_rental)) {
echo "<a class='fancybox fancybox.iframe' id='rental' value={$row['layout']} href=\"brochures\items-rental.php?id={$row['client_name']}\"></a>";
}?>
</div>
What I would like, is for the HREF link to change to
\"brochures\items-rental-layout2.php?id={$row['client_name']}\
If VALUE contains the text "layout2". I know that I can change HREF using jquery code
$(document).ready(function () {
$("#event").attr("href", "http://the.new.url")
});
I'm just not sure how to do that depending if the VALUE contains text "layout2". Any help is much appreciated. Thanks
You can just do it straight in the PHP code:
while ($row = mysql_fetch_array($query_rental)) {
$layoutFlag = $row['layout'] == 'layout2' ? '-layout2' : '';
echo "<a class='fancybox fancybox.iframe' id='rental' value=\"{$row['layout']}\" href=\"brochures\items-rental{$layoutFlag}.php?id={$row['client_name']}\"></a>";
}
You could also do it with Javascript:
$(function () {
// I'm assuming you are going to turn it into a rental class, otherwise change the selector to whatever.
$("a.rental").each(function() {
var rentalItem = $(this);
if (rentalItem.attr('value') === 'layout2') {
// You can choose what to replace, as long as you know it will replace EXACTLY what you want it to. I'm just going with Regex's ^ (start-of-line) operator to make sure that what we are replacing is at the start of the line...
rentalItem.attr('href', rentalItem.attr('href').replace(/^brochures\\items\-rental/, 'brochures\\items-rental-layout2'));
});
});
As you can see, just doing it in PHP is so much easier.
Also as a side note, you are creating multiple elements with the same id. Maybe you meant class='fancybox fancybox.iframe rental'?
And as a second side note, I suggest using the data- prefix for holding custom data. In layout's case, use data-layout='layout-whatever'. You can then use .attr('data-layout') to get the layout attribute (it's easier to understand what that code is doing too!).
You can either run the IF statement on the PHP loop
while ($row = mysql_fetch_array($query_rental)) {
echo "<a class='fancybox fancybox.iframe' id='rental' value={$row['layout']} href=\"brochures\items-rental".($row['layout'] == 'layout2' ? '-layout2' : '').".php?id={$row['client_name']}\"></a>";
}
Or by jQuery
$( "a.fancybox" ).each(function( index ) {
if($(this).val() == "layout2") {
oldHref = $(this).attr('href');
newHref = oldHref.replace('items-rental.php', 'items-rental-layout2.php')
$(this).attr('href', newHref);
}
});
all your links have the same ID which can cause some issues when you wuold want to work with them with jQuery.
If you have more a tags with the fancybox class, try adding a unique class to these tags and update the each loop
My question is simple.
I have the following code:
<div class="last"
<?php
if hasClass(last){
echo " style='width:100%;' ";
}
?>
></div>
I know the if statement is wrong, but the idea is there. I want to know how can I check if this div has the .last class then echo something.
I've been searching around but didn't work anything (didn't find much though).
Best regards.
As already in the comments told it's possible with PHP with DOM parsers.
I'm gonna give you 2 very simple solutions which will save you a lot of work:
CSS:
<style>
.last {
width:100%;
}
</style>
jQuery:
<script type="text/javascript">
$(document).ready(function(){
if($('div').hasClass('last')){
$('div').css('width', '100%');
}
});
</script>
PHP runs on server, so it generates HTML. If you have that class="last" you don't need to check - it's part of the code....hard-coded.
But you can have some PHP variable and depending on it's place print out class and also style for that other element:
<?php
$print_last = true;
?>
...
<div <?php if ($print_last) echo 'class="last" ';
<?php
if ($print_last){
echo " style='width:100%;' ";
}
?>
></div>
But if you want to check on html element you have to do it on client side (browser) from JavaScript and jQuery can be helpful too.
It is possible to check that using PHP, however that couldn't be done easliy (you'll need to parse buffered HTML using DOM parser, then look up for divs, etc...).... Much better solution is to do that with Javascript/jQuery, using Document.getElementsByClassName() function.
Sample solution:
var elements = document.getElementsByClassName("last");
for(var i = 0; i < elements.length; i++)
{
var element = elements[i];
element.style.width = "100%";
}
#azhpo
Obviously the HTML being the front end language you have to pass the elements either through some submit button or via ajax request.
Using submit button: select the class name of div using either javascript
var className = document.getElementById("myDIV").className
document.getElementById("myHiddenField").value = className;
Now on clicking the submit button it would get submitted
Using ajax:
Again take the classname either through javascript / jquery
var className = jQuery("#myDiv").attr("class");
Now fire ajax query and send the class name to your script
jQuery.ajax({
url: 'file.php',
type: 'POST',
data: 'class='+className,
success: function(data){//do whatever you want},
error:function(){//do whatever you want}
});
I have a list of <img> tags with each of them contains different id. This is done using PHP for loop as shown below:
<?php
for($n=0; $n<=5; $n++)
{
?>
<img id="<?php echo 'time_'.$n; ?>" src="$output-mp4_thumbnails-$n.jpg">
<?php
}
?>
I want to use jQuery in such a way that, when I click on the specific image on my browser, it would print out the id accordingly. Below is how I code it:
$(document).ready(function () {
$("img").click(function () {
alert($("img").attr("id"));
});
});
However this keeps printing only the first id, which is time_0. I have been looking around for ways to solve this, and I found out about change(), but it can only be used for form inputs.
Any suggestions will be greatly appreciated.
You're nesting php tags <?php and ?>, specifically in the loop.
Try to echo out the image tag as:
for($n=0; $n<=5; $n++)
{
echo "<img id='time_{$n}' src='{$output}-mp4_thumbnails-{$n}.jpg' />";
}
This should generate unique image ids as time_0, time_1 and so on upto time_5. In addition to this, you also need to incorporate either #Arun's answer or #tchow002 answer on the jQuery side as:
$(document).ready(function () {
$("img").click(function () {
alert(this.id)
});
});
Try this alert($(this).attr("id"));
this will select the img that was clicked. Your current code matches the first img instead and does not account for what was clicked.
you have a problem with the alert, you have alert($("img").attr("id")) which will always alert the id of the first img element, instead you need to alert the id of the clicked element so alert(this.id)
$(document).ready(function () {
$("img").click(function () {
var $id = this.id;
alert(id);
});
});
for($n=0; $n<=5; $n++) {
echo sprintf("<img id='time_%d' src='%s-mp4_thumbnails-%d.jpg' />", $n, $output, $n);
}
Probably a dead simple and idiotic question (I'm totally new to javascript):
I have this code that loads a new post by clicking on a "next" or "back"-link. The clicks variable is used to scroll up and down in the sql-limit-statement (using the swapContent function), means you move backward or forward in the database by clicking the links. It works easy and perfectly:
<script type="text/javascript">
var clicks = -1;
function increase()
{
clicks++;
return false;
}
function decrease()
{
clicks--;
return false;
}
</script>
<div id="<?php echo $post['id'].'-multipost'; ?>">
<?php include('views/posts/_postmultipost.php'); ?>
</div>
<div id="<?php echo $post['id']; ?>-next" class="rightbutton" style="display:block;">
next
</div>
<div id="<?php echo $post['id']; ?>-back" class="leftbutton" style="display:none;">
back
</div>
The only problem: As you see I have several posts (post-IDs). But the javascript var "clicks" is always the same. How can I add the post-id into the javascript variable name "clicks", well, something like this :
var <?php echo $post['id']; ?>-clicks = -1;
Of course it doesn't work this way, but I have no clue how to manage it. Any advice? Sorry for this stupid question...
Thanks for your help!
UPDATE
Ok, got the solution: Bryan was right!!!
Changed the code to:
<script type="text/javascript">
var clicks = {};
clicks['<?php echo $post['id']; ?>'] = -1;
function increase()
{
clicks['<?php echo $post['id']; ?>']++;
return false;
}
</script>
The javascript in html stays as it is:
>
Clicks is now an object and will output the following in the swapContent-Function:
count: Array
(
[80] => 0
)
In php you would access the value like this:
foreach($count as $key=>$value) { $count = $value }
In javascript it seems to work a bit different like this:
for(x in clicks)
{
var clicks = clicks[x];
}
Seems to work perfectly now, thanks for your help!!
I'm not incredibly familiar with PHP, so I don't know about php echo. However, would using an object work?
var postClicks = {};
postClicks['<?php echo $post['id']; ?>'] = -1;
As far as I understand you are trying to get this:
var something-clicks = -1;
But in JS something-clicks is an expression - substraction of two variables.
Name tokens in JS cannot contain '-' in contrary with CSS.
You have a syntax error:
onmousedown="increase(); javascript:swapContent('next', clicks, '<?php echo $post['id']; ?>', '<?php echo $post['title']; ?>', '<?php echo $_SESSION['user']['id']; ?>');"
that javascript: is the problem. That property is expected to contain raw JS, and that token is invalid. the javascript used as a protocol is for use on the href property of an a tag.
Other than that, it looks alright. Just type clicks in the JS console of your browser to get the current value returned. Or add console.log('clicks:', clicks); to your function so that the result is logged out on each click.
How can we use PHP code in JavaScript?
Like
function jst()
{
var i = 0;
i = <?php echo 35; ?>
alert(i);
}
Please suggest a better way.
If your whole JavaScript code gets processed by PHP, then you can do it just like that.
If you have individual .js files, and you don't want PHP to process them (for example, for caching reasons), then you can just pass variables around in JavaScript.
For example, in your index.php (or wherever you specify your layout), you'd do something like this:
<script type="text/javascript">
var my_var = <?php echo json_encode($my_var); ?>;
</script>
You could then use my_var in your JavaScript files.
This method also lets you pass other than just simple integer values, as json_encode() also deals with arrays, strings, etc. correctly, serialising them into a format that JavaScript can use.
If you put your JavaScript code in the PHP file, you can, but not otherwise. For example:
page.php (this will work)
function jst()
{
var i = 0;
i = <?php echo 35; ?>;
alert(i);
}
page.js (this won't work)
function jst()
{
var i = 0;
i = <?php echo 35; ?>
alert(i);
}
PHP has to be parsed on the server. JavaScript is working in the client's browser.
Having PHP code in a .js file will not work, except you can tell the server to parse the file you want to have as .js before it sends it to the client. And telling the server is the easiest thing in the world: just add .php at the end of the filename.
So, you could name it javascript.php. Or, so you know what this file is PRIMARILY, you could name it javascript.js.php - the server will recognize it as .php and parse it.
This is the bit of code you need at the top of your JavaScript file:
<?php
header('Content-Type: text/javascript; charset=UTF-8');
?>
(function() {
alert("hello world");
}) ();
Yes, you can, provided your JavaScript code is embedded into a PHP file.
You're pretty much on the ball. The only difference is I'd separate out the JavaScript code so the majority was in an external static file. Then you just define variables or call a function from the actual PHP page:
<script type="text/javascript>
function_in_other_file(<?php echo my_php_var; ?>);
</script>
A small demo may help you:
In abc.php file:
<script type="text/javascript">
$('<?php echo '#'.$selectCategory_row['subID']?>').on('switchChange.bootstrapSwitch', function(event, state) {
postState(state,'<?php echo $selectCategory_row['subID']?>');
});
</script>
Here is an example:
html_code +="<td>" +
"<select name='[row"+count+"]' data-placeholder='Choose One...' class='chosen-select form-control' tabindex='2'>"+
"<option selected='selected' disabled='disabled' value=''>Select Exam Name</option>"+
"<?php foreach($NM_EXAM as $ky=>$row) {
echo '<option value='."$row->EXAM_ID". '>' . $row->EXAM_NAME . '</option>';
} ?>"+
"</select>"+
"</td>";
Or
echo '<option value=\"'.$row->EXAM_ID. '\">' . $row->EXAM_NAME . '</option>';
We can't use "PHP in between JavaScript", because PHP runs on the server and JavaScript - on the client.
However we can generate JavaScript code as well as HTML, using all PHP features, including the escaping from HTML one.