init

README.md

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+### 应用场景
+1. 限制只开启一个或有限个进程运行
+
+### 局限性
+只能在同一台服务器内生效
+
+### Install
+
+```
+composer require sn01615/file-lock
+```
+### Usage
+
+```php
+use PhpUtils\FileLock;
+FileLock::lock('lockKey');
+```

composer.json

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+{
+  "name": "sn01615/file-lock",
+  "description": "Php file lock tool.",
+  "type": "library",
+  "license": "MIT",
+  "authors": [
+    {
+      "name": "YangLong",
+      "email": "[email protected]"
+    }
+  ],
+  "autoload": {
+    "psr-4": {
+      "PhpUtils\\": "src"
+    }
+  },
+  "support": {
+    "source": "https://github.com/sn01615/file-lock",
+    "issues": "https://github.com/sn01615/file-lock/issues",
+    "email": "[email protected]"
+  },
+  "keywords": [
+    "FileLock"
+  ],
+  "repositories": [
+    {
+      "type": "git",
+      "url": "[email protected]:sn01615/file-lock.git",
+      "name": "GitHub"
+    }
+  ]
+}

src/FileLock.php

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+<?php
+
+namespace PhpUtils;
+
+class FileLock
+{
+
+    private static $fp;
+
+    private static $prefix;
+
+    private static $instances = [];
+
+    private $lockFile;
+
+    public static function lock($tag)
+    {
+        if (!self::$prefix) {
+            self::$prefix = sys_get_temp_dir() . '/_PHP_FileLock_';
+        }
+
+        $filename = self::$prefix . sha1($tag);
+        file_put_contents($filename, time());
+        self::$fp = fopen($filename, "r+");
+        if (!flock(self::$fp, LOCK_EX | LOCK_NB)) {
+            die(0);
+        }
+        self::$instances[$tag] = new static();
+        self::$instances[$tag]->lockFile = $filename;
+    }
+
+    public static function unlock($tag)
+    {
+        if (self::$fp !== null) {
+            flock(self::$fp, LOCK_UN);
+        }
+    }
+
+    public function __destruct()
+    {
+        unlink($this->lockFile);
+    }
+}
+