feat: add new method readFirstLine()

Author: inhere

src/Traits/FileSnippetReadTrait.php

@@ -18,6 +18,8 @@
 use function count;
 use function fclose;
 use function feof;
+use function fgets;
+use function fopen;
 use function fseek;
 
 /**
@@ -137,6 +139,22 @@ public static function getLines5u3d(string $file, int $baseLine = 1): array
         return self::readRangeLines($file, $baseLine, 5);
     }
 
+    /**
+     * Read the first line contents
+     *
+     * @param string $filepath
+     *
+     * @return string
+     */
+    public static function readFirstLine(string $filepath): string
+    {
+        $file = fopen($filepath, 'rb');
+        $line = fgets($file);
+        fclose($file);
+
+        return (string)$line;
+    }
+
     /**
      * 读取文件的最后几行（支持大文件读取）
      *