Use usort, here’s an example adapted from the manual: function cmp($a, $b) { return strcmp($a->name, $b->name); } usort($your_data, “cmp”); You can also use any callable as the 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($this, “cmp”)); // “cmp” should … Read more
It’s the double colon operator :: (see list of parser tokens).
For syntax errors, you need to enable error display in the php.ini. By default these are turned off because you don’t want a “customer” seeing the error messages. Check this page in the PHP documentation for information on the 2 directives: error_reporting and display_errors. display_errors is probably the one you want to change. If you … Read more
Depends on your priorities. If performance is your absolute driving characteristic, then by all means use the fastest one. Just make sure you have a full understanding of the differences before you make a choice Unlike serialize() you need to add extra parameter to keep UTF-8 characters untouched: json_encode($array, JSON_UNESCAPED_UNICODE) (otherwise it converts UTF-8 characters … Read more
Try var_export You may want to check out var_export — while it doesn’t provide the same output as var_dump it does provide a second $return parameter which will cause it to return its output rather than print it: $debug = var_export($my_var, true); Why? I prefer this one-liner to using ob_start and ob_get_clean(). I also find … Read more
PHP 8 or newer: Use the str_starts_with function: str_starts_with(‘http://www.google.com’, ‘http’) PHP 7 or older: Use the substr function to return a part of a string. substr( $string_n, 0, 4 ) === “http” If you’re trying to make sure it’s not another protocol. I’d use http:// instead, since https would also match, and other things such … Read more
Use the second parameter of json_decode to make it return an array: $result = json_decode($data, true);
You can use number_format(): return number_format((float)$number, 2, ‘.’, ”); Example: $foo = “105”; echo number_format((float)$foo, 2, ‘.’, ”); // Outputs -> 105.00 This function returns a string.
Use sprintf : sprintf(‘%08d’, 1234567); Alternatively you can also use str_pad: str_pad($value, 8, ‘0’, STR_PAD_LEFT);
The short answer is NO, PDO prepares will not defend you from all possible SQL-Injection attacks. For certain obscure edge-cases. I’m adapting this answer to talk about PDO… The long answer isn’t so easy. It’s based off an attack demonstrated here. The Attack So, let’s start off by showing the attack… $pdo->query(‘SET NAMES gbk’); $var … Read more