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Require File
The require function is used just like?include function of the previous lesson. But there is one big difference between the two functions. Require vs Include When you include a file with the include function and PHP cannot find it you will see an error message like the following: PHP Code: <?php include("menu.inc"); echo "Hello World!"; ?> Display:
Warning:
main(menu.inc): failed to open stream: No such file or directory in /home/websiteName/FolderName/menu.inc on line 2 Warning: main(): Failed opening 'menu.inc' for inclusion (include_path='.:/usr/lib/php:/usr/local/lib/php') in /home/websiteName/FolderName/menu.inc on line 2 Hello World! Notice that our echo statement was executed With the require function we would get something like the following example. PHP
Code: echo "Hello World!"; ?> Display: Warning:
main(menu.inc): failed to open stream: No such file or directory in /home/websiteName/FolderName/menu.inc on line 2 Fatal error: main(): Failed opening required 'menu.inc' (include_path='.:/usr/lib/php:/usr/local/lib/php') in /home/websiteName/FolderName/menu.inc on line 2 Notice that the echo statement was not executed. That was because our script execution died after the require function returned a fatal error!? Require function should be used instead of include function because your scripts should not be executing if necessary files are missing or misnamed. Note |
