PHP Passthru The Art of Error Handling with Standard Error Redirection

I'd like to issue an arbitrary shell command in a subroutine and have it return an array that contains one element representing stdout and another element ... ... PHP has CLI - Command Line Interface so it can use STDIN, STDOUT, & STDERR instead of or along with the CGI - Common Gateway Interface to a ... ... parameter to the PHP variable $key . If ... value that returns on the page is technically STDERR output, and passthru only returns STDOUT . ... stderr: "PHP message: PHP Warning: shell_exec() has been disabled for security reasons in shell.php on line 2" while reading response header ... The 1 denotes standard output (stdout). The 2 denotes standard error (stderr). So 2>&1 says to send standard error to where ever standard ... How to print a line to STDERR and STDOUT in PHP? tagged How to, PHP, Programming, shell, STDOUT, Tutorial. 在php中，执行shell有很多，如：system()、exec()等等。 能拿到完整结果的，只有shell_exec()与passthru()函数。 区别：. shell_exec — 通过shell 环境执行命令 ... The simple question is: WHY? the second parameter of exec should receive, line by line, all che content of program output. I tried also with passthru, that ... 0 is stdin, 1 is stdout, while 2 is stderr. Each element can be: An array describing the pipe to pass to the process. The first element is the descriptor type ... ... stderr = Display errors to STDERR (affects only CGI/CLI binaries!) ; ... exec | passthru | shell_exec | system | Switch User Environment ...