DomDocument(PHP)加载非格式良好的HTML时禁用警告 [英] Disable warnings when loading non-well-formed HTML by DomDocument (PHP)
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问题描述
我需要解析一些HTML文件,但是它们格式不正确,PHP会输出警告。我想以编程方式避免这种调试/警告行为。请指教。
代码:
//创建一个DOM文档并加载HTML数据
$ xmlDoc = new DomDocument;
//这会抛出警告
$ xmlDoc-> loadHTML($ fetchResult);
这:
@ $ xmlDoc-> loadHTML($ fetchResult)
可以禁止警告,但如何以编程方式捕获这些警告?
解决方案
您可以使用 set_error_handler
class ErrorTrap {
protected $ callback;
protected $ errors = array();
函数__construct($ callback){
$ this-> callback = $ callback;
}
函数call(){
$ result = null;
set_error_handler(array($ this,'onError'));
try {
$ result = call_user_func_array($ this-> callback,func_get_args());
} catch(Exception $ ex){
restore_error_handler();
抛出$ ex;
}
restore_error_handler();
返回$ result;
}
函数onError($ errno,$ errstr,$ errfile,$ errline){
$ this-> errors [] = array($ errno,$ errstr,$ errfile,$ errline);
}
函数ok(){
return count($ this-> errors)=== 0;
}
函数错误(){
return $ this-> errors;
$ / code $ / pre
用法:
//创建DOM文档并加载HTML数据
$ xmlDoc = new DomDocument();
$ caller = new ErrorTrap(array($ xmlDoc,'loadHTML'));
//这不会抛出任何警告
$ caller-> call($ fetchResult);
if(!$ caller-> ok()){
var_dump($ caller-> errors());
}
I need to parse some HTML files, however, they are not well-formed and PHP prints out warnings to. I want to avoid such debugging/warning behavior programatically. Please advise. Thank you!
Code:
// create a DOM document and load the HTML data
$xmlDoc = new DomDocument;
// this dumps out the warnings
$xmlDoc->loadHTML($fetchResult);
This:
@$xmlDoc->loadHTML($fetchResult)
can suppress the warnings but how can I capture those warnings programatically?
解决方案 You can install a temporary error handler with set_error_handler
class ErrorTrap {
protected $callback;
protected $errors = array();
function __construct($callback) {
$this->callback = $callback;
}
function call() {
$result = null;
set_error_handler(array($this, 'onError'));
try {
$result = call_user_func_array($this->callback, func_get_args());
} catch (Exception $ex) {
restore_error_handler();
throw $ex;
}
restore_error_handler();
return $result;
}
function onError($errno, $errstr, $errfile, $errline) {
$this->errors[] = array($errno, $errstr, $errfile, $errline);
}
function ok() {
return count($this->errors) === 0;
}
function errors() {
return $this->errors;
}
}
Usage:
// create a DOM document and load the HTML data
$xmlDoc = new DomDocument();
$caller = new ErrorTrap(array($xmlDoc, 'loadHTML'));
// this doesn't dump out any warnings
$caller->call($fetchResult);
if (!$caller->ok()) {
var_dump($caller->errors());
}
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