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exit(3) [php man page]

EXIT(3) 								 1								   EXIT(3)

exit - Output a message and terminate the current script

SYNOPSIS
void exit ([string $status]) DESCRIPTION
void exit (int $status) Terminates execution of the script. Shutdown functions and object destructors will always be executed even if exit is called. exit is a language construct and it can be called without parentheses if no $status is passed. PARAMETERS
o $status - If $status is a string, this function prints the $status just before exiting. If $status is an integer, that value will be used as the exit status and not printed. Exit statuses should be in the range 0 to 254, the exit status 255 is reserved by PHP and shall not be used. The status 0 is used to terminate the program successfully. Note PHP >= 4.2.0 does NOT print the $status if it is an integer. RETURN VALUES
No value is returned. EXAMPLES
Example #1 exit example <?php $filename = '/path/to/data-file'; $file = fopen($filename, 'r') or exit("unable to open file ($filename)"); ?> Example #2 exit status example <?php //exit program normally exit; exit(); exit(0); //exit with an error code exit(1); exit(0376); //octal ?> Example #3 Shutdown functions and destructors run regardless <?php class Foo { public function __destruct() { echo 'Destruct: ' . __METHOD__ . '()' . PHP_EOL; } } function shutdown() { echo 'Shutdown: ' . __FUNCTION__ . '()' . PHP_EOL; } $foo = new Foo(); register_shutdown_function('shutdown'); exit(); echo 'This will not be output.'; ?> The above example will output: Shutdown: shutdown() Destruct: Foo::__destruct() NOTES
Note Because this is a language construct and not a function, it cannot be called using variable functions. Note This language construct is equivalent to die(3). SEE ALSO
register_shutdown_function(3). PHP Documentation Group EXIT(3)

Check Out this Related Man Page

exit(1) 							   User Commands							   exit(1)

NAME
exit, return, goto - shell built-in functions to enable the execution of the shell to advance beyond its sequence of steps SYNOPSIS
sh exit [n] return [n] csh exit [ ( expr )] goto label ksh *exit [n] *return [n] DESCRIPTION
sh exit will cause the calling shell or shell script to exit with the exit status specified by n. If n is omitted the exit status is that of the last command executed (an EOF will also cause the shell to exit.) return causes a function to exit with the return value specified by n. If n is omitted, the return status is that of the last command exe- cuted. csh exit will cause the calling shell or shell script to exit, either with the value of the status variable or with the value specified by the expression expr. The goto built-in uses a specified label as a search string amongst commands. The shell rewinds its input as much as possible and searches for a line of the form label: possibly preceded by space or tab characters. Execution continues after the indicated line. It is an error to jump to a label that occurs between a while or for built-in command and its corresponding end. ksh exit will cause the calling shell or shell script to exit with the exit status specified by n. The value will be the least significant 8 bits of the specified status. If n is omitted then the exit status is that of the last command executed. When exit occurs when executing a trap, the last command refers to the command that executed before the trap was invoked. An end-of-file will also cause the shell to exit except for a shell which has the ignoreeof option (See set below) turned on. return causes a shell function or '.' script to return to the invoking script with the return status specified by n. The value will be the least significant 8 bits of the specified status. If n is omitted then the return status is that of the last command executed. If return is invoked while not in a function or a '.' script, then it is the same as an exit. On this man page, ksh(1) commands that are preceded by one or two * (asterisks) are treated specially in the following ways: 1. Variable assignment lists preceding the command remain in effect when the command completes. 2. I/O redirections are processed after variable assignments. 3. Errors cause a script that contains them to abort. 4. Words, following a command preceded by ** that are in the format of a variable assignment, are expanded with the same rules as a vari- able assignment. This means that tilde substitution is performed after the = sign and word splitting and file name generation are not performed. ATTRIBUTES
See attributes(5) for descriptions of the following attributes: +-----------------------------+-----------------------------+ | ATTRIBUTE TYPE | ATTRIBUTE VALUE | |Availability |SUNWcsu | +-----------------------------+-----------------------------+ SEE ALSO
break(1), csh(1), ksh(1), sh(1), attributes(5) SunOS 5.10 15 Apr 1994 exit(1)

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