A collection of tips for using PHP

PHP The unique syntax mixes C, Java, Perl and PHP's innovative syntax. It can execute dynamic web pages faster than CGI or Perl. Compared with other programming languages, dynamic pages made with PHP embed programs into HTML documents for execution, and the execution efficiency is much higher than CGI that completely generates HTML tags. Here are ten advanced PHP application tips.

1, Use the ip2long() and long2ip() functions to convert the IP address into an integer and store it in the database.

This method reduces the storage space to nearly a quarter (15 bytes for char(15) vs. 4 bytes for integer), it is simpler to calculate whether a specific address is within a range page, and Searching and sorting are made faster (although sometimes just a little faster).

2, use the checkdnsrr() function to verify whether the domain name exists when verifying the email address.

This built-in function confirms that the specified domain name can be resolved to an IP address. The user comments section of the PHP documentation for this function has a simple user-defined function based on checkdnsrr() that verifies the validity of the email address. For those who think their email address is [url=mailto:“joeuser@wwwphp.net]“joeuser@wwwphp.net[/url]” instead of [url=mailto:“joeuser@php.net]“joeuser@php. net[/url]” guys, this method can be very convenient to catch them.

3, If you are using PHP 5 and MySQL 4.1 or higher, consider abandoning the mysql_* series of functions and using the improved mysqli_* series of functions.

A nice feature is that you can use prepared statements, which can speed up queries if you are maintaining a database-intensive site. Some assessment scores.