Waits for a read lock

# SyncReaderWriter::readlock

(PECL sync >= 1.0.0)

SyncReaderWriter::readlock — Waits for a read lock

### Description

public SyncReaderWriter::readlock(int `$wait` = -1): bool

Obtains a read lock on a SyncReaderWriter object.

### Parameters

`wait`
  The number of milliseconds to wait for a lock. A value of -1 is infinite.

### Return Values

Returns `true` on success or `false` on failure.

### Examples

Example #1 SyncReaderWriter::readlock() example

`<?php
$readwrite = new SyncReaderWriter("FileCacheLock");
$readwrite->readlock();
/* ... */
$readwrite->readunlock();
?>`

### See Also

- SyncReaderWriter::readunlock() - Releases a read lock

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