PHP中include和require的区别实例分析
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先编辑command.php文件 然后编辑console.php文件 原本想要包含并执行这个echo，没想到写错了文件名，如果是require，会报出这样的错误： Fatal error: require(): Failed opening required 'command1.php' (include_path='.') in console.php on line 4
PHP Warning: require(command1.php): failed to open stream: No such file or directory in console.php on line 4 PHP Fatal error: require(): Failed opening required 'command1.php' (include_path='.') in console.php on line 4 如果把require改为include 会报出这样的错误： Warning: include(): Failed opening 'command1.php' for inclusion (include_path='.') in console.php on line 4
Warning: include(command1.php): failed to open stream: No such file or directory in console.php on line 4 Warning: include(): Failed opening 'command1.php' for inclusion (include_path='.') in console.php on line 4 Warning: include(command1.php): failed to open stream: No such file or directory in console.php on line 4 Warning: include(): Failed opening 'command1.php' for inclusion (include_path='.') in console.php on line 4 如果使用require_once或者include_once，只要包含路径正确，那么循环只执行一次。 总结： 使用require，如果文件没有包含成功，就会报出一个fatal error，整个程序就中止了。 使用include，如果文件没有包含成功，就会报出一个普通的warning，之后的代码仍会执行。 如果你的Web程序使用了MVC这种对文件包含强依赖的设计方法，请使用require_once。 （编辑：李大同） 【声明】本站内容均来自网络，其相关言论仅代表作者个人观点，不代表本站立场。若无意侵犯到您的权利，请及时与联系站长删除相关内容! |