Execution Operators
Execution Operators
PHP supports one execution operator: backticks (``). Note that these are not single-quotes! PHP will attempt to execute the contents of the backticks as a shell command; the output will be returned (i.e., it won't simply be dumped to output; it can be assigned to a variable). Use of the backtick operator is identical to shell_exec().
<?php $output = `ls -al`; echo "<pre>$output</pre>"; ?>
Note:
The backtick operator is disabled when safe mode is enabled or 登录查看完整内容