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Nilai yang betul tidak dikembalikan selepas menaik taraf PHP 5.4 kepada PHP 7.4.
P粉718165540
P粉718165540 2023-07-17 18:42:22
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Saya cuba membuat beberapa skrip yang dijalankan pada PHP 5.4 dijalankan pada PHP 7.4. Tiada ralat sintaks dikesan kecuali ralat lulus demi rujukan usang yang telah dibetulkan.

Dalam beberapa bahagian aplikasi, saya tidak mendapat nilai pulangan yang betul. Saya menjalankan php7cc dan PHPStorm untuk melihat sama ada saya dapat menangkap sebarang ralat dan amaran penamatan, tetapi tidak mendapat sebarang petunjuk tentang masalahnya.

Terdapat skrip yang menghuraikan data XML dan meletakkannya ke dalam objek kelas. _MV_WRITE_._MV_SEP_._MV_SEP_.$this->mvKey._MV_SEP_.$this->mvObj->toString()._MV_SEP_Bahagian ini betul kecuali $item->toString() mengembalikan rentetan yang betul nilai.

Adakah terdapat apa-apa dalam kod ini yang berfungsi dalam PHP 5.4 tetapi tidak dalam PHP 7.4? Di bawah ialah kod yang dimaksudkan.

Skrip utama


<html>
    <head>
        <title>Demo MV</title>
    </head>
    <body>
<?php

include_once 'demo_mv.php';
include_once 'demo_xml_parser.php';

$xmltext = "<Test></Test>";

echo "Creating XML Parser. <br>";
$xp = New XMLParser();

echo  "Parsing XML to MV item. <br>";
If( !$xp->ParseToMVItem( $xmltext ) ) {
    echo "Parsing XML item failed. <br>";
}

echo  "Getting formatted output. <br>";
$item = $xp->GetMVItem();
echo print_r( $item ) . "<br>";

$fv = New MVFile("123456789", $item);
$mvObject = $fv->getFormattedItem( );
echo "Formatted output: " . $mvObject . "<br>";
    
?>
    </body>
</html>

Penghurai XML

<?php

Class XMLParser
{
    // set up some variables for use by the parser
        var $xp; // Parser
        var $g_level = 0;           // Current XML depth
        var $g_amc = 0;             // Current Result index
        var $currentTag = "";       // Name of current element
        var $g_elements = Array();  // Names of elements by depth
        var $g_result = Array();    // Result array
        var $errstring;             // String of error message
        var $MVItem;                // MV Item object To Parse into
        var $currentData = "";      // Data in current element

    Function XMLParser()
    {
        // Constructor
    }
    
    Function ParseToMVItem( $xml )
    {
        // Initialise MV Item
        $this->MVItem = New MVItem("");

        // create parser
        $this->xp = xml_parser_create();
        xml_set_object( $this->xp, $this );

        // set element handlers
        xml_set_element_handler($this->xp, "elementBegin", "elementEnd");
        xml_set_character_data_handler($this->xp, "characterData");
        xml_parser_set_option($this->xp, XML_OPTION_CASE_FOLDING, FALSE);

        // parse data
        if (!xml_parse($this->xp, $xml, True )) 
        {
            $errstring = " Line: " . xml_get_current_line_number( $this->xp);
            $errstring .= " Column: " . xml_get_current_column_number( $this->xp) . "<br/>";
            $errstring .= xml_error_string(xml_get_error_code($this->xp) );
            $this->errstring = "XML parser error: " . $errstring ;
            // destroy parser
            xml_parser_free($this->xp);
            Return False;
        }   
        // Success 
        // destroy parser
        xml_parser_free($this->xp);
        Return True;
    }
    
    Function elementBegin($xp, $name, $attributes)
    {   
        //file_log( "Attributes: " . $attributes . "rn" );
        // opening tag handler
        $this->g_amc++;
        $amc = $this->g_amc;
        $level = $this->g_level ++;
        //file_log( "Level: " . $level . "rn" );
        $this->g_elements[ $level -1 ] = $name;
        // export the name of the current tag to the global scope
        $this->currentTag = $name;
        $this->currentData = "";

        // Add to MV Item
        $s_level = $level;
        settype( $s_level, "string");
        $this->MVItem->replace( $s_level, $amc, 1 );
        $this->MVItem->replace( $name, $amc, 2 );
        $ename = $this->MVItem->extract( $amc , 2 );
        // Handle attributes
        $attrib = "";
        $index = 0;
        foreach ($attributes as $key => $value) {
            $index ++;
            $attrib =  trim( $key . "=" . $value );         
//          echo $attrib . " - index=$index<br/>";
            $this->MVItem->replace( $attrib, $amc, 3, $index );
//          echo $this->MVItem->extract(  $amc, 3, $index ) . "=attrib$index<br/>";
        }
    
    }

    Function elementEnd($xp, $name)
    {
        // closing tag handler      
//      echo $this->currentData;
        $this->MVItem->replace( trim($this->currentData), $this->g_amc, 4 );        
         
        $this->g_level --;
        $this->currentTag = $this->g_elements[ $this->g_level -1] ;
    }

    Function characterData($xp, $data)
    {
        // character data handler
        $data = Trim( $data );
        If($data != '') {
//          echo $data . "<br />";
            $this->currentData .= " ". $data;
//          $this->MVItem->replace( $data, $this->g_amc, 4 );       
        }
    }   

    Function GetMVItem()
    {
        Return $this->MVItem;
    }   
}
?>

MVItem

<?php

if ( ! defined( '_MV_CLASS' ) ) {
  define('_MV_CLASS', true );

  /*
  * Define constants
  */
  define('_MV_LOGIN_',1);
  define('_MV_LOGOFF_',2);
  define('_MV_EXECUTE_',3);

  define('_MV_CALL_',4);
  define('_MV_SELECT_',5);
  define('_MV_OPEN_',6);
  define('_MV_READNEXT_',7);
  define('_MV_READ_',8);
  define('_MV_READU_',9);
  define('_MV_WRITE_',10);
  define('_MV_RELEASE_',11);
  define('_MV_DELETE_',12);
  define('_MV_CLOSE_',13);
  define('_MV_TEST_EXIST_',14);
  define('_MV_LOCK_ITEM_',15);
  define('_MV_READV_',16);
  define('_MV_NOOP_',18);
  define('_MV_SELECT_TCL_',17);
  define('_MV_STATUS_',19);
  
  define('_MV_SEP_',chr(001));
  define('_MV_AM_',chr(254));
  define('_MV_VM_',chr(253));
  define('_MV_SVM_',chr(252));
  define('_MV_DIFFDATE_',732);
  define('_MV_DIFFTIME_',86400000);
  
  define('_MV_CONNECTION_TCP_',1);
  define('_MV_CONNECTION_TCP_PROXY_',2);
 
class MVFile{
    // Private
    var $mvKey;
    var $mvObj;
    
    function __construct($key, $item){
        $this->mvKey = $key;
        $this->mvObj = $item;
    }
    
    function getFormattedItem(){
        $this->mvKey = _MV_WRITE_._MV_SEP_._MV_SEP_.$this->mvKey._MV_SEP_.$this->mvObj->toString()._MV_SEP_;
        return $this->mvKey;
    }
    
 } // MVFile

class MVItem {
    var $Record;
    var $origrec;
    
    function __construct($rec = ""){
        if(empty($rec)){
            $this->Record = Array();
            $this->origrec = $this->Record;
            return;
        }
        $this->setRecord($rec);
    }

    function setRecord($newval){
        $rec = explode(_MV_AM_,$newval);
        $nbam = count($rec);
        $this->Record = Array();
        $this->origrec = $newval;
        for($am = 0;$am < $nbam;$am++) {
            $vam = explode(_MV_VM_,$rec[$am]);
            $nbvm = count($vam);
            $lvm = Array();
            for($vm = 0;$vm < $nbvm;$vm++){
                $vvm = explode(_MV_SVM_,$vam[$vm]);
                $lvm[$vm] = $vvm;
            }
            $this->Record[$am] = $lvm;
        }
        return true;
    }
    
    function toString(){
       return $this->extract();    
    }
    
    function extract($am = 0,$vm = 0,$svm = 0) {
        $am --;
        $vm --;
        $svm --;
        //file_log( "SVM: " . $svm . "rn" );
        if($vm == -1) $svm = -1;
        
        if($am == -1) {
            $nbam = count($this->Record);
            $res = "";
            for($am = 0;$am<$nbam;$am++) {
                $nbvm = count($this->Record[$am]);
                $lvm = Array();
                for($vm= 0;$vm<$nbvm;$vm++){
                    if(is_array($this->Record[$am][$vm])){
                       $lvm[$vm] = implode(_MV_SVM_,$this->Record[$am][$vm]);
                    }else{
                       $lvm[$vm] = $this->Record[$am][$vm];
                    }
                }
                if(is_array($lvm) ){
                   $res[$am] = implode(_MV_VM_,$lvm);
                } else {
                   $res[$am] = $lvm;
                }
            }
            if(is_array($res)) {
               return implode(_MV_AM_,$res);
            } else {
               return $res;
            }
        }
        
        if($vm == -1) {
            $nbvm = count($this->Record[$am]);
            $lvm = Array();
            for($vm= 0;$vm<$nbvm;$vm++){
                $lvm[$vm] = implode(_MV_SVM_,$this->Record[$am][$vm]);
            }
            return implode(_MV_VM_,$lvm);
        }

        if($svm == -1 ){
//          MM fix undefined offset         
            if(count($this->Record) < ( $am + 1 ) ) {
                //file_log("SVM = -1 rn");
                return "";
            }
            if(count($this->Record[$am]) < ( $vm + 1 ) ) {
                //file_log("SVM = -1 rn");
                return "";
            }
//          End Of fix  

           return implode(_MV_SVM_,$this->Record[$am][$vm]);
        } else {

            return $this->Record[$am][$vm][$svm];
        }
    }
    
    function replace($newval,$am = 0, $vm = 0 , $svm = 0){
        if($am == 0) return;
        if($vm == 0) $svm = 0;
        
        for($i=count($this->Record);$i < $am;$i++){
            $this->Record[$i]= Array(""); 
        }       
        
        if($vm == 0) {
            $this->Record[$am-1] = array($newval);    
        }else{
        
           for($i = count($this->Record[$am-1]);$i < $vm ; $i++){
                $this->Record[$am-1][$i] = Array(""); 
           }
           
           if($svm == 0) {
              $this->Record[$am-1][$vm-1] = Array($newval);
           }else{
               for($i = count($this->Record[$am-1][$vm-1]);$i < $svm ; $i++){
                    $this->Record[$am-1][$vm-1][$i] = Array(""); 
               }
//               $this->Record[$am-1][$vm-1][$svm-1] = Array($newval);
               $this->Record[$am-1][$vm-1][$svm-1] = $newval;
           }
        }
    }

    function ins(&$tab,$pos,$newval){
        $fin = $tab;
        $nb = count($tab);
        array_splice($tab,-($nb-$pos),($nb-$pos));
        array_splice($tab,-1,1,array($newval,""));
        array_splice($fin,0,($pos-1));
        array_splice($tab,-1,1,$fin);
    }
        
    function insert($newval, $am = 0,$vm = 0,$svm = 0){
        if($am == 0) return;
        if($vm == 0) $svm = 0;
        
        if ($am > count($this->Record) ) {
            $this->replace($newval,$am);
            return;
        }
        
        if($vm == 0) {
            $this->ins($this->Record,$am,array($newval));
        }else{
            if($vm > count($this->Record[$am-1])) {
                $this->replace($newval,$am,$vm);
                return;
            }
           
            if($svm == 0) {
               $this->ins($this->Record[$am-1],$vm,$newval);
            }else{
               for($i = count($this->Record[$am-1][$vm-1]);$i < $svm -1 ; $i++){
                   $this->Record[$am-1][$vm-1][$i] = Array(""); 
               }

               $this->ins($this->Record[$am-1][$vm-1],$svm,$newval);
            }
        }
    }
    
    function delete($am = 0 ,$vm = 0,$svm = 0) {
        if($am == 0) return;
        if($vm == 0) $svm =0;
        
        if($vm == 0){
           array_splice($this->Record,$am - 1,1);
        }else{
           if($svm == 0) {
                array_splice($this->Record[$am-1],$vm - 1,1);
           }else{
                array_splice($this->Record[$am-1][$vm-1],$svm - 1,1);
           }
        }
           
    }
    
    function AMCount(){
//MM
//echo '<' . count( $this->Record ) . '>';
        return count($this->Record);
    }
    
    function VMCount($am){
        if ($am > count($this->Record) || $am == 0) return 0;
        $tmp = $this->Record[$am-1];
        
        return count($tmp);
    }
    
    
    function SVMCount($am,$vm){
        if ($am > count($this->Record) || $am == 0) return 0;
        
        $tmp = $this->Record[$am-1];

        if ($vm > count($tmp) || $vm == 0 ) return 0;
        
        $tmp = $tmp[$vm-1];
        
        return count($tmp);
    }
    
    
  } // MVItem
 
}
?>

Berikut ialah nilai pulangan yang betul dalam PHP 5.4

Creating XML Parser.
Parsing XML to MV item.
Getting formatted output.
MVItem Object ( [Record] => Array ( [0] => Array ( [0] => Array ( [0] => 0 ) [1] => Array ( [0] => Test ) [2] => Array ( [0] => ) [3] => Array ( [0] => ) ) ) [origrec] => Array ( ) ) 1
Formatted output: 101234567890�Test��

Berikut ialah keputusan yang saya perolehi dalam PHP 7.4: 

Creating XML Parser.
Parsing XML to MV item.
Getting formatted output.
MVItem Object ( [Record] => Array ( [0] => Array ( [0] => Array ( [0] => 0 ) [1] => Array ( [0] => Test ) [2] => Array ( [0] => ) [3] => Array ( [0] => ) ) ) [origrec] => Array ( ) ) 1
Formatted output: 101234567890

Penghurai XML sepatutnya baik kerana tatasusunan yang dikembalikan adalah sama. Masalah sebenar terletak pada kaedah getFormattedItem(), yang benar-benar hanya melibatkan kaedah extract(). Telah mencuba menambah kenyataan cetak di pelbagai tempat tetapi tidak dapat menentukan pernyataan mana yang menyebabkan masalah.

P粉718165540
P粉718165540

membalas semua(1)
P粉442576165
P粉4425761652023-07-18 09:21:50 Tingkat 1

只需查看您的最终输出。我猜可能是字符集的问题。通常，新安装的 PHP 版本的 default_charset 值是 UTF-8，但旧版本可能将该值设置为 ISO-8859-1（即 latin-1），因此请检查您的 php.ini（以及可能更改字符集的项目中的其他脚本）。

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