在 php 中如何处理 include_once 循环？
How are include_once loops handled in php?
我有 3 个不同的文件-
fileMainIncludeEverywhere.php
...
include_once('fileMinorInclude.php');
?>
fileMinorInclude.php
...
include_once('fileMainIncludeEverywhere.php');
...
fileToRun.php
...
include_once('fileMainIncludeEverywhere.php');
...
我有很多像 fileToRun.php.
这样的文件
目前我的代码中没有遇到任何错误，但我想知道这是否会失败？
我认为在这种情况下没有错误。因为 include_once 只会在第一次加载该文件，所以即将到来的同一文件的加载请求将被拒绝。
所以从你的例子来看：
fileToRun.php 将加载 fileMainIncludeEverywhere.php（第一次调用）fileMainIncludeEverywhere.php 将加载 fileMinorInclude.php（第一次调用）fileMinorInclude.php 将调用加载 fileMainIncludeEverywhere.php 但它将被拒绝，因为它已在第一步中加载。
希望对您有所帮助。
The include_once statement includes and evaluates the specified file during the execution of the script. This is a behavior similar to the include statement, with the only difference being that if the code from a file has already been included, it will not be included again, and include_once returns TRUE. As the name suggests, the file will be included just once.
这里"code from a file"也包含执行的PHP文件。
请注意，通常最佳做法是使用 require_once() 而不是 include_once()，除非您有使用 include_once() 的特定原因（比如包括可选模板组件）。这是因为如果找不到所需的资源，require_once() 将终止 (fail fast)，正常情况下找不到它应该是终端故障。
我有 3 个不同的文件-
fileMainIncludeEverywhere.php
... include_once('fileMinorInclude.php'); ?>fileMinorInclude.php
... include_once('fileMainIncludeEverywhere.php'); ...fileToRun.php
... include_once('fileMainIncludeEverywhere.php'); ...
我有很多像 fileToRun.php.
这样的文件目前我的代码中没有遇到任何错误，但我想知道这是否会失败？
我认为在这种情况下没有错误。因为 include_once 只会在第一次加载该文件，所以即将到来的同一文件的加载请求将被拒绝。
所以从你的例子来看：
fileToRun.php将加载fileMainIncludeEverywhere.php（第一次调用）fileMainIncludeEverywhere.php将加载fileMinorInclude.php（第一次调用）fileMinorInclude.php将调用加载fileMainIncludeEverywhere.php但它将被拒绝，因为它已在第一步中加载。
希望对您有所帮助。
The include_once statement includes and evaluates the specified file during the execution of the script. This is a behavior similar to the include statement, with the only difference being that if the code from a file has already been included, it will not be included again, and include_once returns TRUE. As the name suggests, the file will be included just once.
这里"code from a file"也包含执行的PHP文件。
请注意，通常最佳做法是使用 require_once() 而不是 include_once()，除非您有使用 include_once() 的特定原因（比如包括可选模板组件）。这是因为如果找不到所需的资源，require_once() 将终止 (fail fast)，正常情况下找不到它应该是终端故障。