zhishifufei_php/vendor/phpoffice/math/docs/usage/elements/semantics.md

Usage

To create a semantics, use the PhpOffice\Math\Element\Semantics class.

Methods

add

The method add an element to the semantics element. The method has one parameter :

• PhpOffice\Math\Element\AbstractElement $element

addAnnotation

The method add an annotation to the semantics element. The method has two parameters :

• string $encoding
• string $annotation

getAnnotation

The method return an annotation based on its encoding. The method has one parameter :

• string $encoding

getAnnotations

The method return alls annotation of the semantics element. The method has no parameter.

getElements

The method return all elements of the semantics element.

remove

The method remove an element to the semantics element. The method has one parameter :

• PhpOffice\Math\Element\AbstractElement $element

Example

Math

y

<annotation encoding="application/x-tex"> y </annotation>

XML

<math display="block">
  <semantics>
    <mi>y</mi>
    
    <annotation encoding="application/x-tex"> y </annotation>
  </semantics>
</math>

PHP

<?php

use PhpOffice\Math\Element;
use PhpOffice\Math\Math;

$math = new Math();

$semantics = new Element\Semantics();
$semantics->add(new Element\Identifier('y'));
$semantics->addAnnotation('application/x-tex', ' y ');

$math->add($semantics);