# 數學文字

> 在 PHP 中使用 Aspose.Slides 處理數學文字：建立與編輯方程式、分數、根號、上下標、格式設定，並將結果匯出為 PPT 和 PPTX。

Source: https://docs.aspose.com/slides/zh-hant/php-java/examples/elements/math-text/


說明如何使用 **Aspose.Slides for PHP via Java** 處理數學文字圖形並格式化方程式。

## **新增數學文字**

建立包含分數和畢氏定理公式的數學圖形。

```php
function addMathText() {
    $presentation = new Presentation();
    try {
        $slide = $presentation->getSlides()->get_Item(0);

        // 新增數學圖形到投影片。
        $mathShape = $slide->getShapes()->addMathShape(0, 0, 720, 150);

        // 存取數學段落。
        $paragraph = $mathShape->getTextFrame()->getParagraphs()->get_Item(0);
        $portion = $paragraph->getPortions()->get_Item(0);
        $mathParagraph = $portion->getMathParagraph();

        // 新增簡單分數: x / y。
        $fraction = (new MathematicalText("x"))->divide("y");
        $mathParagraph->add(new MathBlock($fraction));

        // 新增方程式: c² = a² + b²。
        $mathBlock = (new MathematicalText("c"))
            - >setSuperscript("2")
            - >join("=")
            - >join((new MathematicalText("a"))->setSuperscript("2"))
            - >join("+")
            - >join((new MathematicalText("b"))->setSuperscript("2"));
        $mathParagraph->add($mathBlock);

        $presentation->save("math_text.pptx", SaveFormat::Pptx);
    } finally {
        $presentation->dispose();
    }
}
```

## **存取數學文字**

在投影片中尋找包含數學段落的圖形。

```php
function accessMathText() {
    $presentation = new Presentation("math_text.pptx");
    try {
        $slide = $presentation->getSlides()->get_Item(0);

        // 尋找第一個包含數學段落的圖形。
        $mathShape = null;
        $shapeCount = java_values($slide->getShapes()->size());
        for ($shapeIndex = 0; $shapeIndex < $shapeCount; $shapeIndex++) {
            $shape = $slide->getShapes()->get_Item($shapeIndex);
            if (java_instanceof($shape, new JavaClass("com.aspose.slides.AutoShape"))) {
                $textFrame = $shape->getTextFrame();
                if ($textFrame !== null) {
                    $paragraphCount = java_values($textFrame->getParagraphs()->getCount());
                    for ($paragraphIndex = 0; $paragraphIndex < $paragraphCount; $paragraphIndex++) {
                        $paragraph = $textFrame->getParagraphs()->get_Item($paragraphIndex);
                        $portionCount = java_values($paragraph->getPortions()->getCount());
                        for ($portionIndex = 0; $portionIndex < $portionCount; $portionIndex++) {
                            $portion = $paragraph->getPortions()->get_Item($portionIndex);
                            if (java_instanceof($portion, new JavaClass("com.aspose.slides.MathPortion"))) {
                                $mathShape = $shape;
                                break 3;
                            }
                        }
                    }
                }
            }
        }
    } finally {
        $presentation->dispose();
    }
}
```

## **移除數學文字**

從投影片中刪除數學圖形。

```php
function removeMathText() {
    $presentation = new Presentation("math_text.pptx");
    try {
        $slide = $presentation->getSlides()->get_Item(0);

        // 假設投影片上的第一個圖形是數學圖形。
        $mathShape = $slide->getShapes()->get_Item(0);

        // 從投影片中移除數學圖形。
        $slide->getShapes()->remove($mathShape);

        $presentation->save("math_text_removed.pptx", SaveFormat::Pptx);
    } finally {
        $presentation->dispose();
    }
}
```

## **格式化數學文字**

設定數學部分的字型屬性。

```php
function formatMathText() {
    $presentation = new Presentation("math_text.pptx");
    try {
        $slide = $presentation->getSlides()->get_Item(0);

        // 假設投影片上的第一個圖形是數學圖形。
        $mathShape = $slide->getShapes()->get_Item(0);

        $paragraph = $mathShape->getTextFrame()->getParagraphs()->get_Item(0);
        $portion = $paragraph->getPortions()->get_Item(0);
        $portion->getPortionFormat()->setFontHeight(20);

        $presentation->save("math_text_formatted.pptx", SaveFormat::Pptx);
    } finally {
        $presentation->dispose();
    }
}
```