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                <?php  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                /**  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                 * Radio checkbox fields.  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                 */  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                class HTMLRadioField extends HTMLFormField { | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                	/**  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                	 * @param array $params  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                	 *   In adition to the usual HTMLFormField parameters, this can take the following fields:  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                	 *   - flatlist: If given, the options will be displayed on a single line (wrapping to following  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                	 *     lines if necessary), rather than each one on a line of its own. This is desirable mostly  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                	 *     for very short lists of concisely labelled options.  | 
            
            
                                                                                                            
                                                                
            
                                    
            
            
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                	 */  | 
            
            
                                                                        
                            
            
                                    
            
            
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                	public function __construct( $params ) { | 
            
            
                                                                        
                            
            
                                    
            
            
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                		parent::__construct( $params );  | 
            
            
                                                                        
                            
            
                                    
            
            
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                		if ( isset( $params['flatlist'] ) ) { | 
            
            
                                                                        
                            
            
                                    
            
            
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                			$this->mClass .= ' mw-htmlform-flatlist';  | 
            
            
                                                                        
                            
            
                                    
            
            
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                		}  | 
            
            
                                                                        
                            
            
                                    
            
            
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                	}  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                	function validate( $value, $alldata ) { | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                		$p = parent::validate( $value, $alldata );  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                		if ( $p !== true ) { | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                			return $p;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                		}  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                		if ( !is_string( $value ) && !is_int( $value ) ) { | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                			return false;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                		}  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                		$validOptions = HTMLFormField::flattenOptions( $this->getOptions() );  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                		if ( in_array( strval( $value ), $validOptions, true ) ) { | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                			return true;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                		} else { | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                			return $this->msg( 'htmlform-select-badoption' )->parse();  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                		}  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                	}  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                	/**  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                	 * This returns a block of all the radio options, in one cell.  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                	 * @see includes/HTMLFormField#getInputHTML()  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                	 *  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                	 * @param string $value  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                	 *  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                	 * @return string  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                	 */  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                	function getInputHTML( $value ) { | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                		$html = $this->formatOptions( $this->getOptions(), strval( $value ) );  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                		return $html;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                	}  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                	function getInputOOUI( $value ) { | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                		$options = [];  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                		foreach ( $this->getOptions() as $label => $data ) { | 
            
                            
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                			$options[] = [  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                				'data' => $data,  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                				'label' => $this->mOptionsLabelsNotFromMessage ? new OOUI\HtmlSnippet( $label ) : $label,  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                			];  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                		}  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                		return new OOUI\RadioSelectInputWidget( [  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                			'name' => $this->mName,  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                			'id' => $this->mID,  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                			'value' => $value,  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                			'options' => $options,  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                		] + OOUI\Element::configFromHtmlAttributes(  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                			$this->getAttributes( [ 'disabled', 'tabindex' ] )  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                		) );  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                	}  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                	protected function shouldInfuseOOUI() { | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                		return true;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                	}  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                	function formatOptions( $options, $value ) { | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                		global $wgUseMediaWikiUIEverywhere;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                		$html = '';  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                		$attribs = $this->getAttributes( [ 'disabled', 'tabindex' ] );  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                		$elementFunc = [ 'Html', $this->mOptionsLabelsNotFromMessage ? 'rawElement' : 'element' ];  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                		# @todo Should this produce an unordered list perhaps?  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                		foreach ( $options as $label => $info ) { | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                			if ( is_array( $info ) ) { | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                				$html .= Html::rawElement( 'h1', [], $label ) . "\n";  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                				$html .= $this->formatOptions( $info, $value );  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                			} else { | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                				$id = Sanitizer::escapeId( $this->mID . "-$info" );  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                				$classes = [ 'mw-htmlform-flatlist-item' ];  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                				if ( $wgUseMediaWikiUIEverywhere || $this->mParent instanceof VFormHTMLForm ) { | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                					$classes[] = 'mw-ui-radio';  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                				}  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                				$radio = Xml::radio( $this->mName, $info, $info === $value, $attribs + [ 'id' => $id ] );  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                				$radio .= ' ' . call_user_func( $elementFunc, 'label', [ 'for' => $id ], $label );  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                				$html .= ' ' . Html::rawElement(  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                					'div',  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                					[ 'class' => $classes ],  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                					$radio  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                				);  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                			}  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                		}  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                		return $html;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                	}  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                	protected function needsLabel() { | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                		return false;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                	}  | 
            
            
                                                                                                            
                                                                
            
                                    
            
            
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                }  | 
            
            
                                                        
            
                                    
            
            
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There are different options of fixing this problem.
If you want to be on the safe side, you can add an additional type-check:
If you are sure that the expression is traversable, you might want to add a doc comment cast to improve IDE auto-completion and static analysis:
Mark the issue as a false-positive: Just hover the remove button, in the top-right corner of this issue for more options.