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This article introduces you what are the 24 suggestions that can optimize the PHP code, the content is very detailed, interested friends can refer to, hope to be helpful to you.

Use multiple parameters of echo instead of string concatenation.

Determine the maximum number of cycles before executing the for loop. Do not calculate the maximum value for each loop. It is best to use foreach instead.

For the global variable, you should unset () as soon as you finish using it.

It is faster to include strings in single quotation marks instead of double quotation marks. Because PHP searches for variables in strings enclosed in double quotes, single quotes do not.

Function to perform the same function instead of regular expression.

When the increment or decrement of the variable $I is performed, $ibasket + is slower than + + $I. This difference is unique to PHP and does not apply to other languages. + $I is faster because it requires only three instructions (opcodes) and $iTunes + requires four instructions. The post increment actually produces a temporary variable, which is then incremented. The pre-increment increases directly on the original value.

Using a select branch statement (switch case) is better than using multiple if,else if statements.

Use var_dump to debug PHP code. If you are looking for php debugging technology, I must say that var_dump should be the target you are looking for, this command can meet all your needs in displaying php information, and most of the debugging code has to do with getting values in PHP.

Using the full path when including the file takes less time to resolve the operating system path.

It is a bad practice to create global values easily, but sometimes it is necessary to do so. It's a good idea to use global values for database tables or database connection information, but don't use global values frequently in your PHP code. In addition, a better approach is to store your global variables in a config.php file.

If you want to know when the script starts to execute, using $_ SERVER ['REQUEST_TIME'] is better than time ().

Open the mod_deflate module of apache.

Blocking error messages with @ is very inefficient.

Try to use a large number of PHP built-in functions.

Incrementing an undefined local variable is 9 to 10 times slower than incrementing a predefined local variable.

Methods in derived classes run faster than the same methods defined in the base class.

Defining only a local variable without calling it in a function also slows down (to the extent equivalent to incrementing a local variable)

Apache parses a PHP script 2 to 10 times slower than parsing a static HTML page. Try to use more static HTML pages and fewer scripts.

As mentioned earlier, the most important part of any php site is likely to be a database. Therefore, you need to be very familiar with how to use sql correctly, learn associative tables and more advanced database techniques.

Calling an empty function with one parameter takes the same time as performing 7 to 8 local variable increments.

When you manipulate a string and need to check whether its length meets certain requirements, you will naturally use the strlen () function in Wuhan Renji Integrated traditional Chinese and Western Medicine Hospital. This function is fairly fast because it doesn't do any calculations and only returns the known string length stored in the zval structure (C's built-in data structure for storing PHP variables).

Object-oriented development is not necessary in all cases. Object-oriented is often very expensive, and each method and object call consumes a lot of memory.

Unless the script can be cached, it will be recompiled each time it is called. The introduction of a PHP caching mechanism can typically improve performance by 25 to 100 percent, eliminating compilation overhead.

This is the end of the 24 suggestions on what can optimize the PHP code. I hope the above can be helpful to you and learn more. If you think the article is good, you can share it for more people to see.

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