PHP XMLReader setRelaxNGSchemaSource()用法及代碼示例

XMLReader::setRelaxNGSchemaSource()函數是PHP中的內置函數，用於設置包含RelaxNG Schema的數據以用於驗證。 setRelaxNGSchemaSource()函數不同於setRelaxNGSchema()函數，因為前者將規則接受為字符串變量，而後者將規則接受為.rng文件。

用法:

bool XMLReader::setRelaxNGSchemaSource( string $source )

參數：此函數接受單個參數$source，該參數包含包含RelaxNG Schema的字符串。

返回值：如果成功，此函數將返回TRUE，否則將返回FALSE。

以下示例說明了PHP中的XMLReader::setRelaxNGSchemaSource()函數：

範例1：

data.xml

<?xml version="1.0"?> 
<body> 
    <div> 
        <h1>GeeksForGeeks</h1> 
        <p>Portal for Geeks</p> 
    </div> 
    <div> 
        <h1>Heading 3</h1> 
        <p>Heading 4</p> 
    </div> 
</body>

index.php

<?php 
  
// Create a new XMLReader instance 
$XMLReader = new XMLReader(); 
  
// Open the XML file 
$XMLReader->open('data.xml'); 
  
// Create rule as a string 
$RNG = "<element name=\"body\" 
xmlns=\"http://relaxng.org/ns/structure/1.0\"> 
<zeroOrMore> 
  <element name=\"div\"> 
    <element name=\"h1\"> 
      <text/> 
    </element> 
    <element name=\"p\"> 
      <text/> 
    </element> 
  </element> 
</zeroOrMore> 
</element>"; 
  
// Load the rule 
$XMLReader->setRelaxNGSchemaSource($RNG); 
  
// Iterate through the XML nodes 
while ($XMLReader->read()) { 
    if ($XMLReader->nodeType == XMLREADER::ELEMENT) { 
  
        // Check if XML follows the relaxNG rule 
        if ($XMLReader->isValid()) { 
            echo "This document is valid!<br>"; 
        } 
  
    } 
} 
?>

輸出：

This document is valid!
This document is valid!
This document is valid!
This document is valid!
This document is valid!
This document is valid!
This document is valid!

範例2：

data.xml

<?xml version="1.0"?> 
<body> 
    <div> 
        <!--Create empty div element 
           to violate rule-->
    </div> 
    <div> 
        <h1>Heading 3</h1> 
        <h2>Heading 4</h2> 
    </div> 
</body>

index.php

<?php 
  
// Create a new XMLReader instance 
$XMLReader = new XMLReader(); 
  
// Open the XML file 
$XMLReader->open('data.xml'); 
  
// Create rule as a string 
$RNG = "<element name=\"body\" 
xmlns=\"http://relaxng.org/ns/structure/1.0\"> 
<zeroOrMore> 
  <element name=\"div\"> 
    <element name=\"h1\"> 
      <text/> 
    </element> 
    <element name=\"h2\"> 
      <text/> 
    </element> 
  </element> 
</zeroOrMore> 
</element>"; 
  
// Load the rule 
$XMLReader->setRelaxNGSchemaSource($RNG); 
  
// Iterate through the XML nodes 
while ($XMLReader->read()) { 
    if ($XMLReader->nodeType == XMLREADER::ELEMENT) { 
  
        // Check if XML follows the relaxNG rule 
        if (!$XMLReader->isValid()) { 
            echo "This document is not valid!<br>"; 
        } 
  
    } 
} 
?>

輸出：

This document is not valid!
This document is not valid!
This document is not valid!

參考： https://www.php.net/manual/en/xmlreader.setrelaxngschemasource.php

相關用法

注：本文由純淨天空篩選整理自gurrrung大神的英文原創作品 PHP | XMLReader setRelaxNGSchemaSource() Function。非經特殊聲明，原始代碼版權歸原作者所有，本譯文未經允許或授權，請勿轉載或複製。