import php functions explicitly

Author: midnight-wonderer

composer.json

@@ -1,15 +1,20 @@
 {
     "name": "slime-systems/object-id",
-    "description": "BSON's ObjectId for PHP",
+    "description": "A feature-packed, BSON-compatible ObjectId implementation for PHP, similar to MongoDB's ObjectId, providing unique ID generation, conversions, and comparison utilities.",
     "type": "library",
     "license": "BSD-2-Clause",
     "keywords": [
-        "BSON",
-        "ObjectId",
-        "MongoDB",
-        "UUID",
-        "bson-objectid",
-        "unique-identifier"
+        "objectid",
+        "object-id",
+        "id",
+        "unique-id",
+        "unique-identifier",
+        "bson",
+        "mongodb",
+        "timestamp",
+        "identifier",
+        "generation",
+        "sortable-id"
     ],
     "scripts": {
         "test": "vendor/bin/pest"

src/ObjectId.php

@@ -6,6 +6,13 @@
 use DateTime;
 use SlimeSystems\ObjectId\Exception\Invalid;
 use SlimeSystems\ObjectIdInternal\Generator;
+use function bin2hex;
+use function hex2bin;
+use function is_string;
+use function preg_match;
+use function strlen;
+use function substr;
+use function unpack;
 
 /**
  * Represents BSON ObjectId data (12 bytes).

src/_internal/Generator.php

@@ -2,6 +2,12 @@
 
 namespace SlimeSystems\ObjectIdInternal;
 
+use function pack;
+use function random_bytes;
+use function random_int;
+use function substr;
+use function time;
+
 /**
  * @internal The class that encapsulates the behaviour of actually generating each
  * part of the ObjectId.
@@ -39,7 +45,7 @@ public function __construct()
     public function nextObjectId(?int $time = null): string
     {
         $time ??= time();
-        $count = $this->counter = ($this->counter + 1) & self::COUNTER_MAX;
+        $count = $this->counter = $this->counter + 1 & self::COUNTER_MAX;
 
         return $this->generate($time, $count);
     }
@@ -66,6 +72,6 @@ public function generate(int $time, int $counter = 0): string
 
         // Concatenate the pieces:
         // Time (4) | PID (5) | Counter (3)
-        return $timeBytes . $this->processId . $counter_bytes;
+        return "{$timeBytes}{$this->processId}{$counter_bytes}";
     }
 }