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How do I uniquely identify computers visiting my web site?
..., fingerprints changed quite
rapidly, but even a simple heuristic was usually able to guess when a fingerprint was an “upgraded” version of a previously observed browser’s
fingerprint, with 99.1% of guesses correct and a false positive rate of only
0.86%.
We discuss what privacy thr...
What is your preferred php deployment strategy? [closed]
...red any disadvantages for having a svn co as a production environment? I really can't think of any disadvantages but it doesn't seem "clean" to have a svn co as production? Why not an svn export or rsync?
– ChrisR
Nov 10 '10 at 18:11
...
How can I sort arrays and data in PHP?
...ue is lower and a value higher than 0 if the first value is higher. That's all that's needed:
function cmp(array $a, array $b) {
if ($a['foo'] < $b['foo']) {
return -1;
} else if ($a['foo'] > $b['foo']) {
return 1;
} else {
return 0;
}
}
Often, you will...
Converting a UNIX Timestamp to Formatted Date String
...es is via the native DateTime class. To get the current time you can just call
$currentTime = new DateTime();
To create a DateTime object from a specific timestamp (i.e. not now)
$currentTime = DateTime::createFromFormat( 'U', $timestamp );
To get a formatted string you can then call
$formatt...
Can I try/catch a warning?
...rror handler
One possibility is to set your own error handler before the call and restore the previous error handler later with restore_error_handler().
set_error_handler(function() { /* ignore errors */ });
dns_get_record();
restore_error_handler();
You could build on this idea and write a re-u...
How can I create an array with key value pairs?
...dd key-value pairs to the end of the array, even if you have integer keys. PHP arrays are ordered, so if you want to prepend an array with a key-value pair, you have to do this: $data = ['user_email' => joy@cargomar.org'] + $data.
– totymedli
May 9 '18 at 22...
How do I compare two DateTime objects in PHP 5.2.8?
...ar_dump($date1 > $date2); // false
For PHP versions before 5.2.2 (actually for any version), you can use diff.
$datetime1 = new DateTime('2009-10-11'); // 11 October 2013
$datetime2 = new DateTime('2009-10-13'); // 13 October 2013
$interval = $datetime1->diff($datetime2);
echo $interval-&g...
Iterate over each line in a string in PHP
I have a form that allows the user to either upload a text file or copy/paste the contents of the file into a textarea. I can easily differentiate between the two and put whichever one they entered into a string variable, but where do I go from there?
...
Pretty-Printing JSON with PHP
...HP 5.4 offers the JSON_PRETTY_PRINT option for use with the json_encode() call.
http://php.net/manual/en/function.json-encode.php
<?php
...
$json_string = json_encode($data, JSON_PRETTY_PRINT);
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Fastest way to check if a string is JSON in PHP?
I need a really, really fast method of checking if a string is JSON or not. I feel like this is not the best way:
30 Answer...