我最终创建了自己的HTML类,主要是为了保持所有输出的一致性.代码如下.
pretty_print = (bool)$new_value;
}
/**
* Set the "separator" (the string that will be printed before tags on a new line)
* @author Glen Solsberry
*/
public function setSeparator($new_value) {
$this->separator = $new_value;
}
/**
* add a tag to the "DOM"
* @author Glen Solsberry
*/
public function tag($tag) {
$this->updateChildrenAndParent();
$this->tags[$this->current_tag]['tag'] = $tag;
$this->tags[$this->current_tag]['open'] = true;
return $this;
}
/**
* set an attribute on the current tag
* @author Glen Solsberry
*/
public function attr($key, $value) {
$this->tags[$this->current_tag]['attrs'][$key] = $value;
return $this;
}
/**
* close the current tag, if it's open. if the tag is already closed, we work back up the chain to determine which tag needs to be closed.
* @author Glen Solsberry
*/
public function close() {
if ($this->isOpen($this->current_tag)) {
$this->tags[$this->current_tag]['open'] = false;
} else {
// work backwards till we find the first open tag, and close it
for($previous_id = $this->current_tag - 1; $previous_id >= 0; $previous_id--) {
if ($this->isOpen($previous_id)) {
$this->tags[$previous_id]['open'] = false;
break;
}
}
}
return $this;
}
/**
* Create a text node
* @author Glen Solsberry
*/
public function text($text) {
$this->updateChildrenAndParent();
$this->tags[$this->current_tag]['text'] = $text;
$this->tags[$this->current_tag]['open'] = false;
return $this;
}
/**
* Updates children and parent information, so that all tags link properly.
* Duplicates will be handled later.
* @author Glen Solsberry
*/
private function updateChildrenAndParent() {
// if the current tag is still open, then this needs to be a child of it
if ($this->isOpen($this->current_tag)) {
$this->tags[$this->current_tag]['children'][] = count($this->tags);
}
$this->current_tag = count($this->tags);
// default value for this tags parent
$this->tags[$this->current_tag]['parent'] = $this->current_tag - 1;
for($parent_id = $this->current_tag - 1; $parent_id >= 0; $parent_id--) {
// is the parent still open?
if ($this->isOpen($parent_id)) {
$this->tags[$this->current_tag]['parent'] = $parent_id;
$this->tags[$parent_id]['children'][] = $this->current_tag;
break;
}
}
}
/**
* Determines whether the passed tag_id is open
* @author Glen Solsberry
*/
private function isOpen($tag_id) {
return (bool)$this->tags[$tag_id]['open'];
}
/**
* Determines whether the passed tag_id is closed
* @author Glen Solsberry
*/
private function isClosed($tag_id) {
return (bool)!$this->tags[$tag_id]['open'];
}
/**
* Generates a single tag's html represenation. Called recursively if there are children
* @author Glen Solsberry
*/
private function generateTag($tag_id) {
$current_tag = $this->tags[$tag_id];
if (isset($current_tag['tag'])) {
$this->output .= "<" . $current_tag['tag'];
if (isset($current_tag['attrs'])) {
ksort($current_tag['attrs']);
foreach($current_tag['attrs'] as $key => $value) {
$this->output .= " " . $key . "=\"" . htmlspecialchars($value) . "\"";
}
}
$this->output .= $this->pretty_print(">");
if (isset($current_tag['children']) && count($current_tag['children']) > 0) {
$children = array_unique($current_tag['children']);
foreach($children as $position => $child_id) {
$this->depth++;
$this->generateTag($child_id);
$this->depth--;
}
$this->output .= $this->pretty_print("");
} else {
$this->output .= $this->pretty_print("");
$this->depth--;
}
} else if (isset($current_tag['text'])) {
$this->output .= $current_tag['text'];
}
}
/**
* Pretty prints the output. Uses newlines and line starters.
* @author Glen Solsberry
*/
private function pretty_print($string) {
$output = "";
if ($this->pretty_print == true && $this->depth > 0) {
$output .= str_repeat($this->separator, $this->depth);
}
$output .= $string;
if ($this->pretty_print == true) {
$output .= "\n";
}
return $output;
}
function __toString() {
$this->generateTag(0);
return $this->output;
}
}
?>
我构建了一些测试来确保一切正常(并成为一个优秀的PHP开发人员)...
sharedFixture;
$html->tag("html");
$html->close();
$this->expectOutputString('');
print $html;
}
public function testOutputLooksCorrect2() {
$html = $this->sharedFixture;
$html->tag("html");
$html->tag("head");
$html->close();
$html->close();
$this->expectOutputString('');
print $html;
}
public function testOutputLooksCorrect3() {
$html = $this->sharedFixture;
$html->tag("html");
$html->tag("head");
$html->tag("link")->attr("rel", "stylesheet")->attr("href", "testOutputLooksCorrect.css")->attr("type", "text/css")->close();
$html->close();
$html->close();
$this->expectOutputString('');
print $html;
}
public function testOutputLooksCorrect4() {
$html = $this->sharedFixture;
$html->tag("html");
$html->tag("head");
$html->tag("link")->attr("href", "testOutputLooksCorrect.css")->attr("rel", "stylesheet")->attr("type", "text/css")->close();
$html->close();
$html->close();
$this->expectOutputString('');
print $html;
}
public function testOutputLooksCorrect5() {
$html = $this->sharedFixture;
$html->tag("html");
$html->tag("head");
$html->tag("link")->attr("type", "text/css")->attr("href", "testOutputLooksCorrect.css")->attr("rel", "stylesheet")->close();
$html->close();
$html->close();
$this->expectOutputString('');
print $html;
}
public function testOutputLooksCorrect10() {
$html = $this->sharedFixture;
$html->tag("html");
$html->tag("head");
$html->tag("link")->attr("rel", "stylesheet")->attr("href", "testOutputLooksCorrect.css")->attr("type", "text/css")->close();
$html->close();
$html->tag("body");
$html->close();
$html->close();
$this->expectOutputString('');
print $html;
}
public function testOutputLooksCorrect11() {
$html = $this->sharedFixture;
$html->tag("html");
$html->tag("head");
$html->tag("link")->attr("rel", "stylesheet")->attr("href", "testOutputLooksCorrect.css")->attr("type", "text/css")->close();
$html->close();
$html->tag("body");
$html->text("This is a testOutputLooksCorrect.");
$html->close();
$html->close();
$this->expectOutputString('This is a testOutputLooksCorrect.');
print $html;
}
public function testOutputLooksCorrect12() {
$html = $this->sharedFixture;
$html->text("This is a testOutputLooksCorrect.");
$this->expectOutputString('This is a testOutputLooksCorrect.');
print $html;
}
public function testOutputLooksCorrect13() {
$html = $this->sharedFixture;
$html->tag("head")->close();
$this->expectOutputString('');
print $html;
}
public function testOutputLooksCorrect14() {
$html = $this->sharedFixture;
$html->tag("head")->tag("title")->text("This is the title")->close()->close();
$this->expectOutputString('This is the title ');
print $html;
}
public function testOutputLooksCorrect15() {
$html = $this->sharedFixture;
$html->tag("html");
$html->tag("head");
$html->tag("link")->attr("rel", "stylesheet")->attr("href", "testOutputLooksCorrect.css")->attr("type", "text/css")->close();
$html->tag("meta")->attr("http-equiv", "Content-Type")->attr("content", "text/html; charset=utf-8")->close();
$html->close();
$html->tag("body");
$html->text("This is a testOutputLooksCorrect.");
$html->close();
$html->close();
$this->expectOutputString('This is a testOutputLooksCorrect.');
print $html;
}
public function testOutputLooksCorrect16() {
$html = $this->sharedFixture;
$html->tag("html");
$html->tag("head");
$html->tag("link")->attr("rel", "stylesheet")->attr("href", "testOutputLooksCorrect.css")->attr("type", "text/css")->close();
$html->tag("meta")->attr("http-equiv", "Content-Type")->attr("content", "text/html; charset=utf-8")->close();
$html->tag("script")->attr("type", "javascript")->attr("src", "blah.js")->close();
$html->close();
$html->tag("body");
$html->text("This is a testOutputLooksCorrect.");
$html->close();
$html->close();
$this->expectOutputString('This is a testOutputLooksCorrect.');
print $html;
}
protected function setUp() {
$html = new HTML;
$html->setPretty(0);
$this->sharedFixture = $html;
}
protected function tearDown() {
$this->sharedFixture = NULL;
}
}
?>
一切正常.但是,所需的时间比我想要的要高得多.对于14k的HTML,大约需要3秒.
在对代码进行分析之后,似乎大部分时间都花在了代码上updateChildrenAndParent.几乎75%的执行都是在那里度过的.任何人都可以建议加快这个速度的方法,因为我不想让网站显着减慢速度.
您应该使用真正的dom方法来解析HTML.它们是用C语言编写的,比你可以天真编写的任何代码快几个数量级.
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