I have a weird question. I want to create script in javascript (or PHP if I have to, I'm just more comfortable in javascript) that reads through a table until it finds specific text (know how to do that) and then returns the text three cells to the right.
To be specific, I want a script that finds a row for a specific printer on this site and returns the printer's status. I know how to select unique text, but not so much about nonunique text.
Try this
$('.epi-dataTable tr:gt(0) td:first-child:contains("printerName")')
.closest('tr').find('td:eq(4)').text();
var printerName = 'yourname',
status = $(':contains(' + printerName + ')').siblings().eq(2).text();
If I understood your question correctly, this is how you could do it using jQuery:
$("td").filter(function() {
return $(this).text() === yourSeachText;
}).next().next().next().text();
Clarifying: the filter function will select only the column whose text equals your search text, and each call to next will return the column's next sibling - another td. Three calls later, you have the column you want, so you can get its text.
Update: you might also be interested in this question, if the site you're querying is not in the same domain as your script. If it is, you can simply load its contents to a div before querying it:
$("#placeholder").load("http://clusters.andrew.cmu.edu/printerstats/", function() {
// The contents were loaded to #placeholder, do your query here
});
If it's not, then you'll have to load that html data somehow, and according to an anwser to that question, your best route is really to do it in PHP (or at least use it to echo the other site's contents to your own).
Related
I have a problem with a HTML table generated with a PHP class and saved into a variable.
This variable also contains text, saved before the table, but the table is displayed before the text.
Here's what I do :
Put a text in a variable :
$RET='Awesome introduction';
Generate a table with a class of my own (it's still a simple table) :
$TAB=new class_table();
$TAB::add_th('Column'); // saves 'Column' in a 'th' 3D array
$TAB::close_line(); // $num_tr++
$TAB::add_td('Cell'); // saves 'Cell' in a 'td' 3D array
$TAB::display(); // generate the table
When I do this :
$RET='Awesome introduction';
$RET.=$TAB::display();
echo $RET;
... I've got the table before the text.
When I do this :
echo 'Awesome introduction';
$TAB::display();
... I've got the table after the text, and that's correct.
When I generate my table without the class, it's correct too, of course.
Do you know if it's normal (maybe the class' call is executed in first ?) and if I can workaround this ?
I ask because this code is a just a easy sample, the real one is much complex and called with AJAX (and a console.log proves that the table is generated before the text). I hope I'm clear enough.
Thank you.
Yes, probably Completely normal. This Display class is probably doing exactly that. Displaying, not returning values. You are assigning nothing to the $RET.= , You can prove it by echoing it a second time, it will print your header a second time but not your table. At the time that you assign nothing to RET you output the table, probably with print statements or echo statements in the Display class. There maybe be some way to use the eval function to capture the output of the Display class, but that's above my pay grade. (This would just be a comment, but i haven't earned the privilege.)
I am reading csv file in php Having 2 columns in it. what i want is when i enter any character from first column from csv in text box then i want related values of second column from same csv file to be come in drop down list. i am quite new to use ajax not get any such type of example.
Can anybody help me?
Thanks..
Here's an example you're looking for: http://www.99points.info/2010/12/n-level-dynamic-loading-of-dropdowns-using-ajax-and-php/
Not quite sure what you want to do, but if you are using jquery, then ajax is very simple. You can use:
var sChar = 'c';
$.get('yourPhpFile.php', { sCharacter:sChar }, function(sData){
alert(sData);
});
This way you call yourPhpFile.php, sCharacter is available in yourPhpFile.php as $_GET parameter, and sData holds the output.
See http://api.jquery.com/jQuery.get/
The following script has been created to test if the value of a db field has changed and if so then reload the page and if not, alert the user that the change has not happened.
The alert is just to see what is being returned by the .post function.
The auto_refresh works fine as i need it to check every 5 seconds, when the if() condition is set to '==' the page alert shows and if it is set to '!=' the page continually reloads.
jQuery.post is getting the db field data but it doesn't seem to be able to compare the 2 values correctly.
any help would be greatly appreciated, thanks
var auto_refresh = setInterval(function(){
$.post("/index.php/listen", function(data) {
if($('#slide').html() != data)
{
window.location.reload()
}
else
{
alert('its the same'+ data);
}
});
}, 5000);
EDITED
Rather than trying to parse raw data, why not pass HTML from the $.post() like:
<p>4</p>
Then the jQuery inserts the the replaces the p tag with the new version from the $.post()
because the html is passed on there is no white space and the comparison can be made correctly.
I don't think it is very safe to compare the new value with an html. Some browsers might add spaces or unwanted chars. I'd try to save the old value in an input of type hidden and use the .val() or, event better, in a variable. It depends of your scenario.
If $('#slide').html() == data
then that means that the conditional failed, it was not equal, so it showed the alert.
The problem is that the data variable might come back with a few extra white spaces. If I were you, I'd try to parse a small section of the data variable, and a small section of the html in slider and compare those values.
Like if slider has something within a p tag or an input value, compare it to the data to see if it has that same value returned in that p tag or input value, then replace all the whitespaces with an empty string just to be safe.
Btw, try not to use alerts since you can't really know for sure if there is an extra whitespace. Try to use something like "debugger" if using IE with visual studios, or console.log when using chrome or firefox.
You are comparing two html strings: one is serialized from the DOM, and another is from a server response.
There's no guarantee that the two strings will ever be the same! Think about it: the same rendered html can have many string differences. E.g. click and click are both the same HTML, but different strings.
You can take two different approaches here:
You can create some kind of canonicalization routine that guarantees that two html fragments you consider "the same" will have the same string form. Run both html fragments through this routine, then compare.
You can manage versions more explicitly.
Include some kind of version indicator:
You can use the ETAG header (which means you can take advantage of http caching mechanisms).
You can include some kind of version number in the html itself (maybe in a data-version attribute), and compare those.
You can keep the html string from your server separately and compare against that.
I want to create a page with 2 independent columns. If the text does not fit in one colum on one page it should be continued on the next page with the same column setup.
I tried using setColumnsArray and selectColumn the problem with this is, that if the first column is full it continues on the next column instead on the next page.
It there a posibility to achive this?
Thank You
See Sample10 which is doing exactly what you are asking for:
PHP Source code: http://www.tcpdf.org/examples/example_010.phps
Final PDF: http://www.tcpdf.org/examples/example_010.pdf
Sample7 might help too but column spreads over multiple pages:
PHP Source code: http://www.tcpdf.org/examples/example_007.phps
Final PDF: http://www.tcpdf.org/examples/example_007.pdf
I solved the problem now without writing everything in html.
I used to following aproache:
Save the top of the columns with getY and getPage.
Write the first column
Use setY and setPage to go back to the top of the second column
Use setX to move the seconds column on the right side.
Using the following hack to get around the problem with different page borders on right and left pages on the second column:
if ($curPage<>$pdf->getPage())
{
$curPage=$pdf->getPage();
if (($curPage % 2)==1)
{
$xPos+=15;
}
else
{
$xPos-=15;
}
}
$pdf->SetX($xPos);
*UPDATE:*I've already answered my question. But you can still give me advise and i'll take your answer as selected
NOTE: If you don't need to know what I want to do with the codes, just skip the first several paragraphs and directly see the codes and tell me why they doesn't work without error.
I want to make something like stackoverflow's similar title search when you enter your title in the ask page.
I need to split words to make regex and then search in the database. Since my application is in Chinese(no spaces between each words) and I think splitting chinese into meaningful phrases using PHP is too hard. I have an idea splitting it in the client side using javascript according to chinese IME's characteristic that, for example, if you want to type the word "你好中国" in chinese, people usually type "nihao[space]zhongguo" in IME(note where the space bar is), since '你好'(nihao - hello) is a phrase and '中国'(zhongguo - china) is another. So when people press space bar i record the word he entered before the space and start a timer of 2 seconds , if he or she enters another words clear the timer and continue to record if he or she doesn't, send each words recorded to the server.
Qustion is, is this a good idea? Are there any other convenient way to do this? And why these lines i wrote to test won't work without error.
script:
$(function(){
var i=0;
$('#t').keyup(function(e){
if(e.keyCode==32)
{
eval("a"+i+"=$(this).val()");
i++;
var timer=setTimeout("for(b=0;b<i;b++){alert(eval('a'+b));}",1000);
if($("#t").keydown())
{
clearTimeout(timer);
}
}
})
})
html:
<input id="t"/>
I think i know why it won't work now:
First, i should be a global variable;
Second, the keydown() function should be outside of the keyup(). modified js:
$(function(){
i=0;
timer=null;
$('#t').keyup(function(e){
if(e.keyCode==32)
{
eval("a"+i+"=$(this).val()");
i++;
timer=setTimeout("for(b=0;b<i;b++){alert(eval('a'+b));}",1000)
}
})
if($("#t").keydown())
{
clearTimeout(timer);
}
})
If you have other suggestions on my idea or codes you can still answer this question or i'll select this one after some time.