How to alert PHP value in JavaScript? - javascript

<script type="text/javascript">
var jvalue = 'this is javascript value';
<?php
$abc = "<script>document.write(jvalue)</script>" ?>
</script>
<?php echo 'php_'.$abc; ?>
<script type="text/javascript">
var test = "<?php echo $abc; ?>";
</script>
<?php
echo '<script language="javascript">';
echo 'alert(test)';
echo '</script>';
?>
How to alert test variable, which contains PHP value?
I would like to get the PHP value in javascript, for further execution in my project.

try this code
<?php
echo '<script language="javascript">alert("'.$test.'"); </script>';
?>
this is updated code for you using javascript and PHP
<?php
$user = "rebel";
echo '<script> var name = "'.$user.'";
alert(name);</script>';
?>
This is the third code for you if this does not work then you have other problem
<?php
$abc= "Hello";
?>
<script type="text/javascript">
var test="<?php echo $abc; ?>";
</script>
<?php
echo '<script language="javascript">';
echo 'alert(test)';
echo '</script>';
?>

why are you assigning the variable to a javascript variable and then echoing that? sounds like extra work to me...
echo 'alert("' . $abc . '");';

Your code is not so clear, i think you want something like this:
<?php
$test = "hi there!";
echo '<script type="text/javascript">';
echo 'alert("'.$test.'")';
echo '</script>';
?>

var test="<?php echo $abc; ?>"
<script language="javascript">alert(test); </script>

If you want to alert the value of $abc, you need to escape the slash in the following line with a backslash, like this.
<?php $abc = "<script>document.write(jvalue)<\/script>" ?>
You also need to remove this line (or escape the < and the > in $abc). If you don't, the script tags will mess up the rendered html code.
<?php echo 'php_'.$abc; ?>

Related

Echoing a mulitple line message in alert function

I need to echo multiple line error in JS alert and I am using below code
Working code
$str = "This is a error1\\n";
$alert = $str."This is error2";
if(!empty($alert)){
?>
<script type="text/javascript">
alert('<?php echo $alert;?>');
</script>
<?php
}
but I need to work on an old written code so this has addslashes function before echo alert like below:
$str = "This is a error1\\n";
$alert = $str."This is error2";
$alert = addslashes($alert);
if(!empty($alert)){
?>
<script type="text/javascript">
alert('<?php echo $alert;?>');
</script>
<?php
}
Output : This is a error1\nThis is error2
I need this to print in two lines I have also tried with only \n but it is not working then.
I'd make javascript do the hard work.
<script type="text/javascript">
var alertArr = ["<?php echo $string1; ?>", "<?php echo $string2; ?>"];
alert(alertArr.join("\n"));
</script>
https://jsfiddle.net/0uwmmm3n/
(Magnificent random url by the way)
EDIT: less messy version, maybe more legitimate
<?php $alertArr = [$string1, $string2]; ?>
<script type="text/javascript">
var alertArr = <?php echo json_encode($alertArr); ?>;
alert(alertArr.join("\n"));
</script>
RE-EDIT: nah, too much work for a job so simple, two conversions is way too much
$str = "This is a error1\\n";
$alert = $str."This is error2";
$alert = addslashes($alert);
if(!empty($alert)){
?>
<script type="text/javascript">
alert('<?php echo $alert;?>');
</script>
<?php
}
I have used this code and it working fine according to your need
if still issue continues then clear your cache

extract all js scripts and style from HTML and add to textarea

I written code below that will extract the js like this:
src="assets/js/jquery.min.js"
src="assets/smooth-scroll/smooth-scroll.js"
I would like to have it like: (I guess my regex is wrong):
<script src="assets/js/jquery.min.js"></script>
<script src="assets/smooth-scroll/smooth-scroll.js"></script>
Here is my code:
$htmlData = file_get_contents($url);
if ($htmlData === false) {
echo "error!!";// Handle the error
die();
}
preg_match_all("/\<script(.*?)?\>(.|\\n)*?\<\/script\>/i", $htmlData, $matches);
//example output #1
echo "<pre>";
echo print_r($matches[1]);
echo "</pre>";
//example output #2
$matches = $matches[1];
foreach ($matches as $val) {
//echo "<script";
echo $val;
//echo "</script>"; //<-- adding <script> tags breaks this code
}
So how would I add all scripts into a textarea from this point?
Not sure the regex for styles to do the same.
You need to include the script part in the captured segment.
preg_match_all("/(\<script(.*?)?\>(?:.|\\n)*?\<\/script\>)/i", $htmlData, $matches);
Ok I figured out my code:
$htmlData = file_get_contents($wurl);
if ($htmlData === false) {
echo "error!!";// Handle the error
die();
}
preg_match_all("/(\<script(.*?)?\>(?:.|\\n)*?\<\/script\>)/i", $htmlData, $scripts);
preg_match_all('/<link(.*?)?\>/is', $htmlData, $styles);
//$scripts.=implode(" ",$matches[2]);
//Print array for scripts to get array level;
echo "<pre>";
print_r($scripts[2]);
echo "</pre>";
//Print array for styles to get array level;
echo "<pre>";
print_r($styles[1]);
echo "</pre>";
$scripts = $scripts[2];
foreach ($scripts as $script) {
$all_scripts.= "%script ".$script."#%/scripts#"."\n";
}
$styles = $styles[1];
foreach ($styles as $style) {
$all_styles.= "%link ".$style."#"."\n";
}
$all_scripts = str_replace(array('%', '#'), array(htmlentities('<'), htmlentities('>')), $all_scripts);
$all_styles = str_replace(array('%', '#'), array(htmlentities('<'), htmlentities('>')), $all_styles);
echo "<p>My Scripts:<br/>";
echo $all_scripts;
echo "</p>";
echo "<p>My Styles:<br/>";
echo $all_styles;
echo "</p>";
?>
<textarea name="my_Styles" rows="8" cols="100">
<?php echo $all_styles; ?>
</textarea>
<textarea name="my_Scripts"rows="8" cols="100">
<?php echo $all_scripts; ?>
</textarea>

Change value of html div using javascript in php foreach

I am running a foreach loop and I want to be able to change the content and class of the affected div elements.
foreach ($fields as $key => $value) { ?>
<script type="text/javascript">
document.getElementById('<?php echo $key ?>').innerHTML = '<?php echo $value ?>';
</script>
<?php } ?>
foreach ($fields as $key => $value) { ?>
<script type="text/javascript">
document.getElementById('<?php echo $key ?>').innerHTML = '<?php echo $value ?>';
</script>
you better use it like this .
<script>
<?php foreach ($fields as $key=>$value){ ?>
document.getElementById("<?php echo $key; ?>").innerHTML = "<?php echo $value; ?>";
<?php } ?>
</script>
and make sure you have all correspoinding elements with the same id as $key in this script for example.
<?php foreach($fields as $key=>$value){ ?>
<div id="<?php echo $key; ?>" ></div>
<?php } ?>
Regards
You may use only one part...
server-side with PHP and more tempting
client-side with Javascript
For the last approach, it could be okay to store / request the array as an JavaScript array, or json object and iterate it / update the existing elements during a loop after the site has been loaded.
A mixture of both may lead to a non-maintainable source and more render and execution time as expected.
I have not got what you actually want, But lets with this code. It may help you...
<script type="text/javascript">
$( document ).ready(function() {
<?php
foreach ($fields as $key => $value) {
?>
document.getElementById('<?php echo $key ?>').innerHTML = '<?php echo $value ?>';
<?php
}
?>
});
</script>

How can I use a php variable in javascript

If I have created a variable in php, say $test, how can I set a variable in javascript, say var test, to be equal to it.
I have already tried var test = <?php $test ?>
I guess
var test = <?php echo json_encode($test) ?>
The naive way var test = '<?php echo ($test) ?>' will fail if $test contains quotes or newlines, let alone is not of the string type (e.g. array, object)
var test = '<?php echo $test; ?>'
try like this :
var test = '<?php echo $test ?>';
var test = '<?php echo $test; ?>';
Or using shorthand echos, like this:
var test = '<?= test;?>';
var test = <?php echo json_encode($test); ?>
You can use
<pre>
var test = '<?php echo $test?>';
</pre>
below the definition of $test.
Change
var test = <?php $test ?>
to
var test = <?php echo $test; ?>
You are missing two things:
var test = <?php $test ?>
1) Echo statement.
2) Single Quotes around PHP snipplet.
So, the corrected code should be:
var test = "<?php echo $test ?>";
Within your page where you want your PHP to output to type:
var MyJavascriptVariable = <?php echo $myPHPVariable; ?>
Advise NOT to use short tags () as this can be disabled by webhosts and may break your code.

Run PHP echoed Javascript

I am just getting into the world of PHP, Javascript and HTML and would like some help from the community regarding the following code. Basically I want to pass variables plucked from a ODBC_connection by PHP into textboxes. Lines 1-3 were for me to test to get the box to update which it does but anything echoed by PHP does not run. I am completely new to this so I realize I must be missing something trivial.
I welcome any suggestions or comments about what I can do to fix this or what I can do better in general.
Thank you.
<script type='text/javascript'>
document.getElementById('modeltxt').value = "test2";
</script>
<?php
echo "<script type='text/javascript'>";
echo "document.getElementById('modeltxt').value =\"TEST3\";";
echo "document.getElementById('customertxt').value = $customer;";
echo "document.getElementById('endusertxt').value = $enduser;";
echo "document.getElementById(dongletxt').value = $dongle;";
echo "document.getElementById('shipdatetxt').value = $shipdate;";
echo "document.getElementById('chasistypetxt').value = $chasistype;";
echo "document.getElementById('chasisnumbertxt').value = $chasisnumber;";
echo "document.getElementById('opsystxt').value = $opsys;";
echo "document.getElementById('dvd1txt').value = $dvd1;";
echo "document.getElementById('dvd2txt').value = $dvd2;";
echo "document.getElementById('storagetxt').value = $storage;";
echo "document.getElementById('nodrivetxt').value = $nodrive;";
echo "document.getElementById('drivesizetxt').value = $drivesize;";
echo "document.getElementById('interface1txt').value = $interface1;";
echo "document.getElementById('interface2txt').value = $interface2;";
echo "document.getElementById('interface3txt').value = $interface3;";
echo "document.getElementById('interface4txt').value = $interface4;";
echo "document.getElementById('interface5txt').value = $interface5;";
echo "document.getElementById('interface6txt').value = $interface6;";
echo "document.getElementById('commentstxt').value = $comments;";
echo "document.getElementById('warrantyexptxt').value = $warrantyexp;";
echo "document.getElementById('extendedwarrantytxt').value = $extwarexp;";
echo "document.getElementById('onsitetxt').value = $onsite;";
echo "document.getElementById('sqlversiontxt').value = $sqlversion;";
echo "<\script>";
You can create dynamics JS using the below
Define Content-Type on the top of your .js.php file:
<?
header('Content-Type: application/javascript');
// Write your php code
?>
and call the js file like this ..
<script type="application/javascript" src="JS_PATH/name-of-file.js.php"></script>
and if you want to use inline php values, you can write like this
<script type="application/javascript">
document.getElementById('modeltxt').value = "<?php echo $dummy_value ?>";
</script>
No need to do this. You can simply use javascript inside php as below :-
As you mention in your question
Basically I want to pass variables plucked from a ODBC_connection by PHP into textboxes.
<?php
// Php block of code
?>
<script type="text/javscript">
document.getElementById('modeltxt').value = "TEST3";
document.getElementById('customertxt').value = "<?php echo $customer;?>";
......
....
...
</script>
<?php
// Another block of code
?>

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