Hopefully this simple tutorial helped you with your development. The reason is that when we yield results from a generator function, it saves its current state until it is called next time. " \n " // Ouput 0 #GeneratorĪs we can see, when using a generator, we have greatly reduced memory usage. Inside it, theme developers set repeated rules for how each post should display, primarily using. The Loop is a PHP while -loop that runs once per fetched post. W3Schools offers free online tutorials, references and exercises in all the major languages of the web. Read more about for loops in our PHP for Loop Tutorial. Inside the function, we open the file and yield its content line by line: function file_lines ($filename) $m1 = memory_get_peak_usage () foreach ( file_lines ( 'lorem.txt' ) as $l) $m2 = memory_get_peak_usage () echo $m2 - $m1. Key Takeaways: The Loop is an extremely important topic in WordPress theme development: it is how WordPress renders a bundle of posts fetched from the database into an HTML webpage. The endfor keyword is used to close the code block of a for loop which was started using the for (.): syntax. We can do the same using a generator function. " \n " // Output 1542736 #Read file using a generator $m1 = memory_get_peak_usage () foreach ( file ( 'lorem.txt' ) as $l) $m2 = memory_get_peak_usage () echo $m2 - $m1. Normal we will load the file content to memory and read its content using a loop. In today's tutorial, we want to introduce a solution by using the generator. ![]() Now that you know how to loop through the files in a directory and spit out the names, let’s use those files with a command. You could change the wild card could to file- to target all of the files that started with file-, or to. The closing tag of a PHP block at the end of a file is optional, and in some cases omitting it is helpful when using include or require, so unwanted whitespace will not occur at the end of files, and you will still be able to add headers to the response later. That tells the for loop to grab every single file in the directory. ![]() In PHP, to fetch content from a file, a common implementation is to loop its content and store them in a temporary variable. From PHP Official Documentation - Instruction separation.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |