1: <?php
 2: 
 3: /**
 4:  * Get namespace name and/or class name from file.
 5:  *
 6:  * @param  string $file The file path.
 7:  *
 8:  * @throws InvalidArgumentException if an argument is not of the expected type.
 9:  * @throws Exception if file don't exists.
10:  *
11:  * @return string
12:  */
13: function xu_get_class_name( $file ) {
14:     if ( ! is_string( $file ) ) {
15:         throw new InvalidArgumentException( 'Invalid argument. Must be string.' );
16:     }
17: 
18:     if ( ! file_exists( $file ) ) {
19:         throw new Exception( sprintf( '`%s`does not exist.', $file ) );
20:     }
21: 
22:     $content         = file_get_contents( $file );
23:     $tokens          = token_get_all( $content );
24:     $class_name      = '';
25:     $namespace_name  = '';
26:     $i               = 0;
27:     $len             = count( $tokens );
28: 
29:     for ( ; $i < $len; $i++ ) {
30:         if ( $tokens[$i][0] === T_NAMESPACE ) {
31:             for ( $j = $i + 1; $j < $len; $j++ ) {
32:                 if ( $tokens[$j][0] === T_STRING ) {
33:                      $namespace_name .= '\\' . $tokens[$j][1];
34:                 } else if ( $tokens[$j] === '{' || $tokens[$j] === ';' ) {
35:                      break;
36:                 }
37:             }
38:         }
39: 
40:         if ( $tokens[$i][0] === T_CLASS ) {
41:             for ( $j = $i + 1; $j < $len; $j++ ) {
42:                 if ( $tokens[$j] === '{' ) {
43:                     $class_name = $tokens[$i + 2][1];
44:                 }
45:             }
46:         }
47:     }
48: 
49:     if ( empty( $class_name ) ) {
50:         return '';
51:     }
52: 
53:     if ( empty( $namespace_name ) ) {
54:         return $class_name;
55:     }
56: 
57:     return $namespace_name . '\\' . $class_name;
58: }
59: