検索条件に日付の絞り込みが指定されている場合、開始日（from）が指定されている場合にタグの内容を処理します。
使い方
<MTIfAltSearchFrom> <!-- do something --> </MTIfAltSearchFrom>
MTIfAltSearchFrom と関連のあるテンプレートタグ (55)
- MTAltSearchAnd_or
- MTAltSearchBlogID
- MTAltSearchCategories_and_or
- MTAltSearchCategoryID
- MTAltSearchCategoryIDs
- MTAltSearchCategoryLabel
- MTAltSearchCurrent
- MTAltSearchDate
- MTAltSearchFeedPath
- MTAltSearchFrom
- MTAltSearchLast
- MTAltSearchLimit
- MTAltSearchMatch
- MTAltSearchMetadata
- MTAltSearchMetadatas
- MTAltSearchNext
- MTAltSearchOffset
- MTAltSearchPageCounter
- MTAltSearchPages
- MTAltSearchParam
- MTAltSearchPath
- MTAltSearchPrev
- MTAltSearchQuery
- MTAltSearchResultNumber
- MTAltSearchResultOffset
- MTAltSearchResultPermalink
- MTAltSearchResults
- MTAltSearchSort_by
- MTAltSearchSort_order
- MTAltSearchTo
- MTIfAltSearchAnd_or
- MTIfAltSearchCategories_and_or
- MTIfAltSearchCurrentCategories
- MTIfAltSearchCurrentCategory
- MTIfAltSearchDate
- MTIfAltSearchDate
- MTIfAltSearchFrom
- MTIfAltSearchMatchQuery
- MTIfAltSearchMetaDatasFooter
- MTIfAltSearchMetaDatasHeader
- MTIfAltSearchModeIsCategories
- MTIfAltSearchModeIsCategory
- MTIfAltSearchModeIsTag
- MTIfAltSearchNoneMatch
- MTIfAltSearchParam
- MTIfAltSearchQuery
- MTIfAltSearchResultCurrent
- MTIfAltSearchResultNext
- MTIfAltSearchResultPrev
- MTIfAltSearchSort_by
- MTIfAltSearchSort_order
- MTIfAltSearchTo
- MTIfCurrentYear
- MTYear
- MTYears
