Enhance quote function to support int arguments

Author: antonmedv

docs/api.md

@@ -614,7 +614,7 @@ Returns current timestamp in UTC timezone in ISO8601 format.
 ## quote()
 
 ```php
-quote(string $arg): string
+quote(string|int $arg): string
 ```
 
 Quotes a string for safe use as a shell argument using ANSI-C $'...' syntax.

src/functions.php

@@ -992,8 +992,9 @@ function timestamp(): string
  * run('echo ' . quote("it's a test"));  // echo $'it\'s a test'
  * ```
  */
-function quote(string $arg): string
+function quote(string|int $arg): string
 {
+    $arg = (string) $arg;
     if ($arg === '') {
         return "\$''";
     }

tests/src/QuoteTest.php

@@ -127,4 +127,24 @@ public function testShellInjectionAttempts()
         self::assertEquals("\$'`rm -rf /`'", quote('`rm -rf /`'));
         self::assertEquals("\$'\$(cat /etc/passwd)'", quote('$(cat /etc/passwd)'));
     }
+
+    public function testIntPositive()
+    {
+        self::assertEquals('42', quote(42));
+    }
+
+    public function testIntZero()
+    {
+        self::assertEquals('0', quote(0));
+    }
+
+    public function testIntNegative()
+    {
+        self::assertEquals('-7', quote(-7));
+    }
+
+    public function testIntMax()
+    {
+        self::assertEquals((string) PHP_INT_MAX, quote(PHP_INT_MAX));
+    }
 }