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Submit form using a button outside the tag
...attribute. Basically
<form id="myform" method="get" action="something.php">
<input type="text" name="name" />
</form>
<input type="submit" form="myform" />
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Why doesn't this code simply print letters A to Z?
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From the docs:
PHP follows Perl's convention when dealing with arithmetic operations on character variables and not C's.
For example, in Perl 'Z'+1 turns into 'AA', while in C 'Z'+1 turns into '[' ( ord('Z') == 90, ord('[') == 91 ).
Note th...
How do I get the current time zone of MySQL?
...e to the system's timezone, which is less than helpful. Since you're using PHP, if the answer from MySQL is SYSTEM, you can then ask the system what timezone it's using via date_default_timezone_get. (Of course, as VolkerK pointed out, PHP may be running on a different server, but as assumptions go,...
Why would json_encode return an empty string
I have a simple php structure with 3 nested arrays.
13 Answers
13
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How to take screenshot of a div with JavaScript?
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If you wish to have "Save as" dialog, just pass image into php script, which adds appropriate headers
Example "all-in-one" script script.php
<?php if(isset($_GET['image'])):
$image = $_GET['image'];
if(preg_match('#^data:image/(.*);base64,(.*)$#s', $image, $match)){
...
How can I detect if the user is on localhost in PHP?
...y web application is on the server it resides on? If I remember correctly, PHPMyAdmin does something like this for security reasons.
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Clear the cache in JavaScript
...ry hour, or every week, you may cache according to file data.
Example (in PHP):
<script src="js/my_script.js?v=<?=md5_file('js/my_script.js')?>"></script>
or even use file modification time:
<script src="js/my_script.js?v=<?=filemtime('js/my_script.js')?>"></scr...
appending array to FormData and send via AJAX
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You have several options:
Convert it to a JSON string, then parse it in PHP (recommended)
JS
var json_arr = JSON.stringify(arr);
PHP
$arr = json_decode($_POST['arr']);
Or use @Curios's method
Sending an array via FormData.
Not recommended: Serialize the data with, then deserialize in PHP
JS
/...
Can linux cat command be used for writing text to file?
...text file:
cat > output.txt <<EOF
some text
some lines
EOF
For PHP file:
cat > test.php <<PHP
<?php
echo "Test";
echo \$var;
?>
PHP
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How does this giant regex work?
...ently found the code below in one of my directories, in a file called doc.php . The file functions or links to a file manager. It's quite nicely done. Basically, it lists all the files in the current directory, and it lets you change directories.
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