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63 lines
1.4 KiB
PHP
63 lines
1.4 KiB
PHP
--TEST--
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Test flock() function: usage variations
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--CREDITS--
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Dave Kelsey <d_kelsey@uk.ibm.com>
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--SKIPIF--
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<?php
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if (substr(PHP_OS, 0, 3) == 'WIN') {
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die('skip.. not for Windows');
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}
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if (function_exists("pcntl_fork") == FALSE) {
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die('skip.. no pcntl_fork()');
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}
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?>
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--FILE--
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<?php
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/*
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Prototype: bool flock(resource $handle, int $operation [, int &$wouldblock]);
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Description: PHP supports a portable way of locking complete files in an advisory way
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*/
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echo "*** Test flock() function: with the operations given as numeric values ***\n";
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$filename = dirname(__FILE__)."/flock_variation1.tmp";
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$file_handle = fopen($filename, "w");
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fwrite($file_handle, str_repeat("Hello2World", 10) );
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fclose($file_handle);
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$file_read = fopen($filename, "r");
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$pid = pcntl_fork();
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echo "-- child process is created --\n";
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if ($pid == -1) {
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die('could not fork');
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} else if ($pid) {
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echo "-- Trying to get the Reader Lock --\n";
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if( flock($file_read, LOCK_EX) ) {
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echo "-- Got Lock --\n";
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sleep(5);
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flock($file_read, LOCK_UN);
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}
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else
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echo "-- Couldn't get the Lock --\n";
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} else {
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echo "-- Trying to get the Writer Lock --\n";
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if( flock($file_read, LOCK_EX) ) {
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echo "-- Got Lock --\n";
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flock($file_read, LOCK_UN);
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}
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else
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echo "-- Couldn't get the Lock --\n";
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}
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echo "*** Done ***\n";
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?>
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--CLEAN--
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<?php
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fclose($file_read);
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fclose($file_write);
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unlink($filename);
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?>
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--EXPECTF--
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