AJAX/JS/PHP: How to replace text in file sent to PHP file, and pass successful attribute?

Question

I have this button by ID of genPDF, which if clicked has this function:

$('#genPDF').click(function () {

    var str = "headingText=" + jQuery("#headingText").val();

    $.ajax({
        url: 'indexpdf.php',
        data: str,
        dataType: "json",
        type: 'post',
        success: function () {
            console.log("Success!");
        }
    });
})

It's supposed to take the text from input "headingText" and send to the php file indexpdf.php.

Then here's my indexpdf.php:

<?
$headingText = trim(isset($_POST['headingText']) ? $_POST['headingText'] : '');

$initialpdf = file_get_contents('file_html.php');

$initialpdf = str_replace(array(
        '%headingText%'
    ), array (
        $headingText,
    ), $initialpdf);

file_put_contents($fp, $initialpdf);
?>

This file is supposed to decalre the headingtext variable from the previous page, and replace each "%headingText%" in file_html.php, then save this html/php file as "file_html2.php"

The problems are, I don't think I'm saving the finalized php file right, and for some reason, while passing the "str" into the ajax php call, it doesn't succeed. If I get rid of the line, "data: str,", it succeeds.

How can I pass in these string variables, replace them in the php file, and save that file as a different file succesfully? What's wrong here?

What is the error ? "...while passing the "str" into the ajax php call, it doesn't succeed.." What Problem you are facing ? — Nana Partykar
– Nana Partykar, Commented Apr 11, 2016 at 19:05
@NanaPartykar it never makes it to the console.log call, and there are no errors mentioned — LatentDenis
– LatentDenis, Commented Apr 11, 2016 at 19:07

Nana Partykar · Accepted Answer · 2016-04-11 19:22:24Z

2

An Alternative Way

<script>
$('#genPDF').click(function () {
  var str = $("#headingText").val();
  $.ajax({url:"indexpdf.php?headingText="+str,cache:false,success:function(result){
        console.log("Success!");
  }});
})
</script>

Use _GET

<?
$headingText = trim(isset($_GET['headingText']) ? $_GET['headingText'] : '');

$initialpdf = file_get_contents('file_html.php');

$initialpdf = str_replace(array(
        '%headingText%'
    ), array (
        $headingText,
    ), $initialpdf);

$initialpdf->saveHTMLFile("file_html2.php");
?>

answered Apr 11, 2016 at 19:22

Nana Partykar

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1 Comment

LatentDenis Over a year ago

I tried your approach and the only thing wrong is that "file_html2.php" is neither being created, nor gets contents placed inside of it. See my revised code..

Eduardo Galván · Accepted Answer · 2016-04-11 19:06:14Z

1

You want to pass an object to data. For this, replace:

data: str

with:

data: { headingText: jQuery("#headingText").val() },

This should pass the value correctly

answered Apr 11, 2016 at 19:06

Eduardo Galván

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1 Comment

LatentDenis Over a year ago

This doesn't work. the ajax call doesn't get to the console call.

har256b · Accepted Answer · 2016-04-11 19:27:18Z

1

First Part You are forcing ajax request to json type and trying to post data as string thats why its not working, try posting your headingText in JSON format i.e.

data: {headingText: jQuery("#headingText").val()}

this will make sure you receive data in PHP

Second Part

After making all the changes you can use alternate function to file_get_contents to store file once manipulation is done i.e. file_put_contents Use it like

$initialpdf = file_get_contents('file_html.php');

$initialpdf = str_replace(array(
        '%headingText%'
    ), array (
        $headingText,
    ), $initialpdf);

file_put_contents("file_html2.php", $initialpdf);

this should address your both issues.

answered Apr 11, 2016 at 19:27

har256b

1185 bronze badges

2 Comments

LatentDenis Over a year ago

I tried your approach and the only thing wrong is that "file_html2.php" is neither being created, nor gets contents placed inside of it.

har256b Over a year ago

what does the error logs say? can you try these steps $handle = fopen("file_html2.php", 'w'); fwrite($handle, $initialpdf); fclose($handle);

rajesh · Accepted Answer · 2016-04-11 19:05:51Z

-1

Try sending it as a json object instead of a string.

str = {headingText:'blabla'}

answered Apr 11, 2016 at 19:05

rajesh

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1 Comment

rajesh Over a year ago

This does not work because you have made a mistake in your code. You need to set method : post Not type:post. No need to send it in url which is not considered safe unless data is not sensitive.

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