PHP: pclose - Manual

Description

int pclose ( resource handle )

Closes a file pointer to a pipe opened by popen().

The file pointer must be valid, and must have been returned by a successful call to popen().

Returns the termination status of the process that was run.

User Contributed Notes
pclose

kcross at nssolutions dot com
16-Jul-2003 04:08


Somewhere between 4.1.1 and 4.2.3, the return value from pclose changed.



The exit status used to be in the second byte, so that the status would be (pclose($fp)/256).



It is now in the low-order byte, so the status is just pclose($fp).



Be careful.

vdweij at mailsurf dot com
12-Mar-2003 09:18


As I understand pclose will return 0 (on every platform) in case popen could not execute the specified command.



Since popen only returns the status wether it was able to send a command and not wether it was succesfully executed. Only the returned value of pclose can be used to check wether a command could be executed.

roel at bouwman dot net
07-Oct-1999 12:23


The return value of pclose() is not the exit status of the program, but a value as returned by waitpid() of wait4().





To obtain the exit status:





$ret=(pclose($f)>>8)&0xFF;

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