')) { $fixed = preg_replace('/<svg\b/i', '<svg aria-hidden="true"', $snippet) ?: $snippet; return "EXPLANATION: Injected aria-hidden=\"true\" to decorative SVG element.\nFIX: " . $fixed; } break; case 'WCAG_LINK_TARGET_BLANK': case 'LinkTargetBlank': if (preg_match('/<a\b[^>]*\btarget=["\']_blank["\']/i', $snippet)) { if (preg_match('/rel=["\']([^"\']*)["\']/i', $snippet, $matches)) { $existingRel = $matches[1]; $newRel = trim($existingRel . ' noopener noreferrer'); $fixed = str_replace($matches[0], 'rel="' . $newRel . '"', $snippet); } else { $fixed = preg_replace('/<a\b/i', '<a rel="noopener noreferrer"', $snippet) ?: $snippet; } return "EXPLANATION: Added rel=\"noopener noreferrer\" to target=\"_blank\" link.\nFIX: " . $fixed; } break; case 'WCAG_2_4_3_TABINDEX': case 'TabindexOrder': if (preg_match('/\btabindex=["\'][1-9]\d*["\']/i', $snippet)) { $fixed = preg_replace('/\btabindex=["\'][1-9]\d*["\']/i', 'tabindex="0"', $snippet) ?: $snippet; return "EXPLANATION: Normalized positive tabindex to tabindex=\"0\" to maintain natural tab order.\nFIX: " . $fixed; } break; case 'WCAG_1_3_1_TABLE_SCOPE': case 'ScopeOnlyOnHeaders': if (preg_match('/<td\b[^>]*\bscope=["\'][^"\']*["\']/i', $snippet)) { $fixed = preg_replace('/\s+scope=["\'][^"\']*["\']/i', '', $snippet) ?: $snippet; return "EXPLANATION: Removed invalid scope attribute from <td> element.\nFIX: " . $fixed; } break; case 'WCAG_2_2_1_META_REFRESH': case 'MetaRefreshBanned': if (preg_match('/<meta\b[^>]*\bhttp-equiv=["\']refresh["\'][^>]*>/i', $snippet)) { $fixed = ''; return "EXPLANATION: Commented out disorienting meta refresh tag.\nFIX: " . $fixed; } break; case 'WCAG_1_3_1_OPTGROUP_LABEL': case 'OptgroupLabel': if (preg_match('/<optgroup\b(?![^>]*\blabel=)/i', $snippet)) { $fixed = preg_replace('/<optgroup\b/i', '<optgroup label="Options"', $snippet) ?: $snippet; return "EXPLANATION: Added fallback label=\"Options\" attribute to <optgroup>.\nFIX: " . $fixed; } break; case 'WCAG_2_4_7_FOCUS_OUTLINE': case 'NoFocusOutline': if (preg_match('/style=["\'][^"\']*outline\s*:\s*(?:none|0)[^"\']*["\']/i', $snippet)) { $fixed = preg_replace('/outline\s*:\s*(?:none|0)/i', 'outline: 2px solid transparent; outline-offset: 2px', $snippet) ?: $snippet; return "EXPLANATION: Replaced outline removal with accessible transparent outline.\nFIX: " . $fixed; } break; case 'WCAG_2_2_2_BLINK': case 'BlinkTagBanned': $fixed = str_replace( ['<blink>', '</blink>', '<BLINK>', '</BLINK>'], ['<span style="text-decoration: blink;">', '</span>', '<span style="text-decoration: blink;">', '</span>'], $snippet ); return "EXPLANATION: Banned <blink> tag replaced with a span and text-decoration style.\nFIX: " . $fixed; case 'WCAG_2_4_3_AUTOFOCUS': case 'AutofocusBanned': $fixed = preg_replace('/\s+autofocus(=["\'](.*?)["\'])?/i', '', $snippet) ?: $snippet; return "EXPLANATION: Autofocus attribute removed to prevent screen reader interruption on load.\nFIX: " . $fixed; case 'WCAG_1_3_1_TABLE_SUMMARY': case 'TableSummaryBanned': $fixed = preg_replace('/\s+summary=["\'](.*?)["\']/i', '', $snippet) ?: $snippet; return "EXPLANATION: Deprecated table summary attribute removed. Use caption elements instead.\nFIX: " . $fixed; case 'WCAG_2_1_1_SCROLLABLE_FOCUS': case 'ScrollableRegionFocusable': if (!str_contains($snippet, 'tabindex')) { $fixed = preg_replace('/(style=["\'](.*?)["\'])/i', '$1 tabindex="0"', $snippet) ?: $snippet; return "EXPLANATION: Added tabindex=\"0\" to scrollable region to allow keyboard scrolling.\nFIX: " . $fixed; } break; case 'WCAG_1_3_1_PRESENTATION_TAGS': case 'PresentationTagsBanned': if (preg_match('/<center>(.*?)<\/center>/is', $snippet, $matches)) { $fixed = '<div style="text-align: center;">' . $matches[1] . '</div>'; return "EXPLANATION: Center element replaced with div and text-align CSS.\nFIX: " . $fixed; } if (preg_match('/<strike>(.*?)<\/strike>/is', $snippet, $matches)) { $fixed = '<span style="text-decoration: line-through;">' . $matches[1] . '</span>'; return "EXPLANATION: Strike element replaced with span and line-through decoration CSS.\nFIX: " . $fixed; } break; case 'WCAG_3_1_1_LANG': case 'HtmlHasLang': if (preg_match('/<html(\s+[^>]*>|>)/i', $snippet)) { $fixed = preg_replace('/<html/i', '<html lang="tr"', $snippet) ?: $snippet; return "EXPLANATION: Injected default lang=\"tr\" to HTML element.\nFIX: " . $fixed; } break; } return null; } }

htmlSnippet; $ruleId = $violation->ruleId; switch ($ruleId) { case 'WCAG_1_1_1_IMG_ALT': case 'WCAG_1_1_1_ImageAlt': case 'ImageAlt': case 'ImgAltText': if (preg_match('/]*\balt=)/i', $snippet)) { $fixed = preg_replace('/]*\baria-hidden=)(?![^>]*\baria-label=)/i', $snippet) && !str_contains($snippet, '')) { $fixed = preg_replace('/<svg\b/i', '<svg aria-hidden="true"', $snippet) ?: $snippet; return "EXPLANATION: Injected aria-hidden=\"true\" to decorative SVG element.\nFIX: " . $fixed; } break; case 'WCAG_LINK_TARGET_BLANK': case 'LinkTargetBlank': if (preg_match('/<a\b[^>]*\btarget=["\']_blank["\']/i', $snippet)) { if (preg_match('/rel=["\']([^"\']*)["\']/i', $snippet, $matches)) { $existingRel = $matches[1]; $newRel = trim($existingRel . ' noopener noreferrer'); $fixed = str_replace($matches[0], 'rel="' . $newRel . '"', $snippet); } else { $fixed = preg_replace('/<a\b/i', '<a rel="noopener noreferrer"', $snippet) ?: $snippet; } return "EXPLANATION: Added rel=\"noopener noreferrer\" to target=\"_blank\" link.\nFIX: " . $fixed; } break; case 'WCAG_2_4_3_TABINDEX': case 'TabindexOrder': if (preg_match('/\btabindex=["\'][1-9]\d*["\']/i', $snippet)) { $fixed = preg_replace('/\btabindex=["\'][1-9]\d*["\']/i', 'tabindex="0"', $snippet) ?: $snippet; return "EXPLANATION: Normalized positive tabindex to tabindex=\"0\" to maintain natural tab order.\nFIX: " . $fixed; } break; case 'WCAG_1_3_1_TABLE_SCOPE': case 'ScopeOnlyOnHeaders': if (preg_match('/<td\b[^>]*\bscope=["\'][^"\']*["\']/i', $snippet)) { $fixed = preg_replace('/\s+scope=["\'][^"\']*["\']/i', '', $snippet) ?: $snippet; return "EXPLANATION: Removed invalid scope attribute from <td> element.\nFIX: " . $fixed; } break; case 'WCAG_2_2_1_META_REFRESH': case 'MetaRefreshBanned': if (preg_match('/<meta\b[^>]*\bhttp-equiv=["\']refresh["\'][^>]*>/i', $snippet)) { $fixed = ''; return "EXPLANATION: Commented out disorienting meta refresh tag.\nFIX: " . $fixed; } break; case 'WCAG_1_3_1_OPTGROUP_LABEL': case 'OptgroupLabel': if (preg_match('/<optgroup\b(?![^>]*\blabel=)/i', $snippet)) { $fixed = preg_replace('/<optgroup\b/i', '<optgroup label="Options"', $snippet) ?: $snippet; return "EXPLANATION: Added fallback label=\"Options\" attribute to <optgroup>.\nFIX: " . $fixed; } break; case 'WCAG_2_4_7_FOCUS_OUTLINE': case 'NoFocusOutline': if (preg_match('/style=["\'][^"\']*outline\s*:\s*(?:none|0)[^"\']*["\']/i', $snippet)) { $fixed = preg_replace('/outline\s*:\s*(?:none|0)/i', 'outline: 2px solid transparent; outline-offset: 2px', $snippet) ?: $snippet; return "EXPLANATION: Replaced outline removal with accessible transparent outline.\nFIX: " . $fixed; } break; case 'WCAG_2_2_2_BLINK': case 'BlinkTagBanned': $fixed = str_replace( ['<blink>', '</blink>', '<BLINK>', '</BLINK>'], ['<span style="text-decoration: blink;">', '</span>', '<span style="text-decoration: blink;">', '</span>'], $snippet ); return "EXPLANATION: Banned <blink> tag replaced with a span and text-decoration style.\nFIX: " . $fixed; case 'WCAG_2_4_3_AUTOFOCUS': case 'AutofocusBanned': $fixed = preg_replace('/\s+autofocus(=["\'](.*?)["\'])?/i', '', $snippet) ?: $snippet; return "EXPLANATION: Autofocus attribute removed to prevent screen reader interruption on load.\nFIX: " . $fixed; case 'WCAG_1_3_1_TABLE_SUMMARY': case 'TableSummaryBanned': $fixed = preg_replace('/\s+summary=["\'](.*?)["\']/i', '', $snippet) ?: $snippet; return "EXPLANATION: Deprecated table summary attribute removed. Use caption elements instead.\nFIX: " . $fixed; case 'WCAG_2_1_1_SCROLLABLE_FOCUS': case 'ScrollableRegionFocusable': if (!str_contains($snippet, 'tabindex')) { $fixed = preg_replace('/(style=["\'](.*?)["\'])/i', '$1 tabindex="0"', $snippet) ?: $snippet; return "EXPLANATION: Added tabindex=\"0\" to scrollable region to allow keyboard scrolling.\nFIX: " . $fixed; } break; case 'WCAG_1_3_1_PRESENTATION_TAGS': case 'PresentationTagsBanned': if (preg_match('/<center>(.*?)<\/center>/is', $snippet, $matches)) { $fixed = '<div style="text-align: center;">' . $matches[1] . '</div>'; return "EXPLANATION: Center element replaced with div and text-align CSS.\nFIX: " . $fixed; } if (preg_match('/<strike>(.*?)<\/strike>/is', $snippet, $matches)) { $fixed = '<span style="text-decoration: line-through;">' . $matches[1] . '</span>'; return "EXPLANATION: Strike element replaced with span and line-through decoration CSS.\nFIX: " . $fixed; } break; case 'WCAG_3_1_1_LANG': case 'HtmlHasLang': if (preg_match('/<html(\s+[^>]*>|>)/i', $snippet)) { $fixed = preg_replace('/<html/i', '<html lang="tr"', $snippet) ?: $snippet; return "EXPLANATION: Injected default lang=\"tr\" to HTML element.\nFIX: " . $fixed; } break; } return null; } }