init: Erste Version aus Test-App erstellen

src/XmlReaderInterfaces.php

@@ -0,0 +1,13 @@
+<?php
+
+namespace TorstenHettstedt\XmlReader\Sax;
+
+interface XmlReaderInterfaces
+{
+
+    function tag_open(string $tag_name, array $attributes): void;
+
+    function cdata(string $tag_name, string $cdata): void;
+
+    function tag_close(string $tag_name): void;
+}

src/XmlSaxParser.php

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+<?php
+
+namespace TorstenHettstedt\XmlReader\Sax;
+
+use InvalidArgumentException;
+
+class XmlSaxParser
+{
+    protected                     $parser;
+    protected XmlReaderInterfaces $xmlReader;
+    protected string              $actualTagName = '';
+
+    public function __construct(XmlReaderInterfaces $xml_reader)
+    {
+        $this->xmlReader = $xml_reader;
+        $this->parser = xml_parser_create();
+
+        xml_set_object($this->parser, $this);
+        xml_set_element_handler($this->parser, "tag_open", "tag_close");
+        xml_set_character_data_handler($this->parser, "cdata");
+    }
+
+    public function __destruct()
+    {
+        xml_parser_free($this->parser);
+        unset($this->parser);
+    }
+
+    public function parse($data):void
+    {
+        xml_parse($this->parser, $data);
+    }
+
+    /**
+     * @param string $path
+     *
+     * @return void
+     * @throws InvalidArgumentException
+     */
+    public function parseFile(string $path): void
+    {
+        // open xml file
+        if (!($handle = fopen($path, "r"))) {
+            throw new InvalidArgumentException('could not open XML file "' . $path . '".');
+        }
+
+        while ($data = fread($handle, 4096)) { // read xml file
+            $this->parse($data);
+        }
+    }
+
+    /** @noinspection PhpUnusedParameterInspection */
+    protected function tag_open($parser, string $tag_name, array $attributes):void
+    {
+        $this->actualTagName = $tag_name;
+        if ($this->actualTagName !== '') {
+            $this->xmlReader->tag_open($tag_name, $attributes);
+        }
+    }
+
+    /** @noinspection PhpUnusedParameterInspection */
+    protected function cdata($parser, string $cdata):void
+    {
+        if ($this->actualTagName !== '' && trim($cdata) !== '') {
+            $this->xmlReader->cdata($this->actualTagName, $cdata);
+        }
+    }
+
+    /** @noinspection PhpUnusedParameterInspection */
+    protected function tag_close($parser, string $tag_name):void
+    {
+        $this->actualTagName = '';
+        $this->xmlReader->tag_close($tag_name);
+    }
+}