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php flock() function
Detailed instructions for use
php flock() function
Chinese translation
Recent Updates: 2018-04-19 11:08:21
英[lɒk] 美[lɑ:k]
n. lock; sluice, ship lock; (machine parts, etc.) lock; a handful, a handful
vt. lock ; lock, close; fix; hide
vi. stuck, immobile; tangled; stiff and immobile
Third person singular: locks plural: locks present participle: locking past tense : locked past participle: locked
php flock() function syntax
Function:Lock or release the file.
Syntax: flock(file,lock,block)
Parameters:
| Parameter | Description |
| file | Required. Specifies an open file to be locked or released. |
| lock | Required. Specifies which lock type to use. |
| block | Optional. If set to 1 or true, blocks other processes while locking. |
Explanation: The file operated by flock() must be an open file pointer.
php flock() function example
<?php
$file = fopen("./test.txt","w+");
// 排它性的锁定
if (flock($file,LOCK_EX))
{
fwrite($file,"Write something");
flock($file,LOCK_UN);
echo "success";
}
else
{
echo "Error locking file!";
}
?>
php flock() function
