Read value from php file method with JavaScript

[user9]

I'm trying to display contents read from a file by php with a JavaScript function. I'm not sure what I'm doing wrong.

function showMsg()
{
 <?php
  $lines = file("text.txt");
 ?>
 
 alert("<?php echo $lines[0];?>");
}

Thank you for your help

[Warboss Alex]

Javascript and PHP don't mix in this sense - PHP is executed on the server before any Javascript is interpreted by the browser.

What you need, is something like this (in the same php file):

<?php
$file_arr = $file("file.txt");
$alert = $file_arr[0];
?>

//start html output here

<script language="Javascript">
function showMsg() {
alert("<?php echo $alert;?>");
}
</script>

<input type="button" value="click me" onClick="showMsg()" />

Hope this helps!

[user9]

Thank you very much Warboss Alex, that helped a lot.