Shulou(Shulou.com)06/03 Report--

In this issue, the editor will bring you about how to optimize the performance of PHP. The article is rich in content and analyzed and described from a professional point of view. I hope you can get something after reading this article.

Although the PHP language is powerful, it also requires programmers to write specifications to create code programs with superior performance. Let's share some tips on PHP performance optimization.

"use iTunes 1 instead of i=i+1. It is in line with the habit of cAccord cymbal +, and it is still efficient."

For the global variable, unset () should be dropped as soon as it is finished.

Do as little file operation as possible, although the file operation efficiency of PHP is not low.

Optimize Select SQL statements and do as few Insert and Update operations as possible (on update, I have been maliciously criticized) to achieve PHP performance optimization

Use PHP internal functions as much as possible (but I wasted the time I could have written a custom function in order to find a function that doesn't exist in PHP, empirical problems!)

When file_get_contents can be used instead of file, fopen, feof, fgets, etc., try to use file_get_contents, because it is much more efficient! But pay attention to the PHP version of file_get_contents when opening a URL file.

Do not declare variables inside the loop, especially large variables: objects (this seems to be more than just a problem to pay attention to in PHP, is it?)

Try not to have cyclic nesting assignments for multidimensional arrays.

Do not use regular expressions when you can manipulate functions with PHP internal strings

Foreach is more efficient, using foreach instead of while and for cycles as far as possible

Using single quotation marks instead of double quotation marks to optimize PHP performance

In multiple nested loops, if possible, the longest loop should be placed on the inside and the shortest loop on the outer layer, so that the number of times cpu cuts across the loop layer can be reduced, thus optimizing program performance.

The above is the editor for you to share how to achieve PHP performance optimization, if you happen to have similar doubts, you might as well refer to the above analysis to understand. If you want to know more about it, you are welcome to follow the industry information channel.

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