Function.proc-open

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proc_open — Execute a command and open file pointers for input/output

Beschreibung

resource proc_open ( string $cmd , array $descriptorspec , array &$pipes [, string $cwd [, array $env [, array $other_options ]]] )

proc_open() is similar to popen() but provides a much greater degree of control over the program execution.

Parameter-Liste

cmd

• The command to execute

descriptorspec

• An indexed array where the key represents the descriptor number and the value represents how PHP will pass that descriptor to the child process. 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 and the second element is an option for the given type. Valid types are pipe (the second element is either r to pass the read end of the pipe to the process, or w to pass the write end) and file (the second element is a filename). A stream resource representing a real file descriptor (e.g. opened file, a socket, STDIN). The file descriptor numbers are not limited to 0, 1 and 2 - you may specify any valid file descriptor number and it will be passed to the child process. This allows your script to interoperate with other scripts that run as "co-processes". In particular, this is useful for passing passphrases to programs like PGP, GPG and openssl in a more secure manner. It is also useful for reading status information provided by those programs on auxiliary file descriptors.

pipes

• Will be set to an indexed array of file pointers that correspond to PHP's end of any pipes that are created.

cwd

• The initial working dir for the command. This must be an absolute directory path, or NULL if you want to use the default value (the working dir of the current PHP process)

env

• An array with the environment variables for the command that will be run, or NULL to use the same environment as the current PHP process

other_options

• Allows you to specify additional options. Currently supported options include: suppress_errors (windows only): suppresses errors generated by this function when it's set to TRUE bypass_shell (windows only): bypass cmd.exe shell when set to TRUE context: stream context used when opening files (created with stream_context_create()) binary_pipes: open pipes in binary mode, instead of using the usual stream_encoding

Rückgabewerte

Returns a resource representing the process, which should be freed using proc_close() when you are finished with it. On failure returns FALSE.

ChangeLog

Version Beschreibung 6.0.0 Added the context and binary_pipes options to the other_options parameter. 5.2.1 Added the bypass_shell option to the other_options parameter. 5.0.0 Added the cwd , env and other_options parameters.

Beispiele

=== #1 A proc_open() example

<?php
$descriptorspec = array(
   0 => array("pipe", "r"),  // stdin is a pipe that the child will read from
   1 => array("pipe", "w"),  // stdout is a pipe that the child will write to
   2 => array("file", "/tmp/error===
 
 
 
 
 
 
 
 
 
 
 
 
 
==Anmerkungen==
 
 
  Hinweis: 
 
    Windows compatibility: Descriptors beyond 2 (stderr) are made available to
    the child process as inheritable handles, but since the Windows
    architecture does not associate file descriptor numbers with low-level
    handles, the child process does not (yet) have a means of accessing those
    handles. Stdin, stdout and stderr work as expected.
   <br />
 
  Hinweis: 
 
   If you only need a uni-directional (one-way) process pipe, use
   [[function.popen|popen()]] instead, as it is much easier to use.
   <br />
 
 
 
 
 
 
==Siehe auch==
* [[function.popen|popen()]]
* [[function.exec|exec()]]
* [[function.system|system()]]
* [[function.passthru|passthru()]]
* [[function.stream-select|stream_select()]]
 
[[Kategorie:PHP 4|P]]
[[Kategorie:PHP 5|P]]
[[Kategorie:Funktionen zur Programmausführung|P]]