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Sort array of objects by object fields
... second argument. Here are some examples:
Using anonymous functions (from PHP 5.3)
usort($your_data, function($a, $b) {return strcmp($a->name, $b->name);});
From inside a class
usort($your_data, array($this, "cmp")); // "cmp" should be a method in the class
Using arrow functions (from...
Configure WAMP server to send email
Is there a way that I can configure the WAMP server for PHP to enable the mail() function?
7 Answers
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Grabbing the href attribute of an A element
...t;getElementsByTagName('a') as $node) {
echo $dom->saveHtml($node), PHP_EOL;
}
The above would find and output the "outerHTML" of all A elements in the $html string.
To get all the text values of the node, you do
echo $node->nodeValue;
To check if the href attribute exists you can ...
How can I output leading zeros in Ruby?
...but similar formating functions are available in perl, ruby, python, java, php, etc.
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PHP string “contains” [duplicate]
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Not the answer you're looking for? Browse other questions tagged php regex string or ask your own question.
How do I implement basic “Long Polling”?
...rror 404 (to show error handling in the coming Javascript example)
msgsrv.php
<?php
if(rand(1,3) == 1){
/* Fake an error */
header("HTTP/1.0 404 Not Found");
die();
}
/* Send a string after a random number of seconds (2-10) */
sleep(rand(2,10));
echo("Hi! Have a random number: " . ...
In PHP, how do you change the key of an array element?
...the array, which you may need to be careful of. Even associative arrays in PHP are ordered, and sometimes that order is leveraged.
– Robin Winslow
Feb 9 '12 at 17:14
7
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Remove non-numeric characters (except periods and commas) from a string
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see also php function money_function() ( php.net/manual/en/function.money-format.php )
– horatio
Feb 9 '11 at 19:28
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How to set HTTP header to UTF-8 using PHP which is valid in W3C validator?
I have several PHP pages echoing out various things into HTML pages with the following code.
6 Answers
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Regular Expression for alphanumeric and underscores
...A-Z, a-z, or underscore (_).
Here is how you would do that:
Tested under php:
$regex = '/^[A-Za-z_][A-Za-z\d_]*$/'
or take this
^[A-Za-z_][A-Za-z\d_]*$
and place it in your development language.
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