插入到XML显示空白页

Question

我试图插入数据到XML使用PHP domdocument。然而，当我按下输入时，它只显示一个空白页面显示没有错误。我究竟做错了什么？

更新：

<?php 

error_reporting(E_ALL); 
ini_set("display_errors", 1); 


    $xmldoc = new DOMDocument(); 
    if(file_exists('test.xml')){ 
    $xmldoc->load('test.xml'); 
    } else { 
    $xmldoc->loadXML('<root/>'); 
    } 

    /*get the values of the html: */ 
    $title_ar = $_POST["title_ar"]; 
    $title_en = $_POST["title_en"]; 

    $intro = $_POST["intro"]; 

    $v_ar = $_POST["v_ar"]; 
    $v_en = $_POST["v_en"]; 
    $v_tren = $_POST["v_tren"]; 

    /*get the values of the html: */ 

    $root = $xmldoc->firstChild; 

    if ($xmldoc->getElementsByTagName("title")->length == 0) { 
    /* Arabic */ 
    $el_title_ar = $xmldoc->createElement('title'); 
    $root->appendChild($el_title_ar); 

    $text_title_ar = $xmldoc->createTextNode($title_ar); 
    $el_title_ar->appendChild($text_title_ar); 
    /* Arabic */ 

    /* English */ 
    $el_title_en = $xmldoc->createElement('title'); 
    $root->appendChild($el_title_en); 

    $text_title_en = $xmldoc->createTextNode($title_en); 
    $el_title_en->appendChild($text_title_en); 
    /* English */ 
    } 
    else if ($xmldoc->getElementsByTagName("introduction")->length == 0) { 
    $el_intro = $xmldoc->createElement('introduction'); 
    $root->appendChild($el_intro); 

    $el_intro_para = $xmldoc->createElement('para'); 
    $el_intro->appendChild($el_intro_para); 

    $text_intro = $xmldoc->createTextNode($intro); 
    $el_intro_para->appendChild($text_intro); 
    } 

    $verse = $xmldoc->createElement('verse'); 
    $root->appendChild($verse); 


    /* Arabic */ 
    $verse_p = $xmldoc->createElement('p'); 
    $verse->appendChild($verse_p); 

    $v_ar_p = $xmldoc->createTextNode($v_ar); 
    $verse_p->appendChild($v_ar_p); 
    /* Arabic */ 


    /* English Translation*/ 
    $verse_trans = $xmldoc->createElement('trla'); 
    $verse->appendChild($verse_trans); 

    $v_en_trans = $xmldoc->createTextNode($v_en); 
    $verse_trans->appendChild($v_en_trans); 
    /* English Translation*/ 


    /* English Transliteration*/*/ 
    $verse_translit = $xmldoc->createElement('trli'); 
    $verse->appendChild($verse_translit); 

    $v_en_translit = $xmldoc->createTextNode($v_tren); 
    $verse_translit->appendChild($v_en_translit); 
    /* English Transliteration*/ 

    /*Save the XML File*/ 
    $xml->formatOutput = true; 
    $xmldoc->save('test.xml'); 

    header("Location: index.php"); 
?> 

Answer 1

$title-ar是非法的变量名。这意味着'变量$title减去常数ar，这将使其成为一个表达式，并且您不能将任何东西指派给表达式（=）。如果在开发时打开display_errors，它会告诉你关于分析错误的信息。