我正在嘗試將在PHP 5.4上運行的某些腳本在PHP 7.4上運行。除了已經修復的過時的傳引用錯誤之外,沒有檢測到語法錯誤。
在應用程式的某個部分,我沒有得到正確的回傳值。我運行了php7cc和PHPStorm來查看是否可以捕捉到任何錯誤和過時警告,但沒有任何能夠解決問題的線索。
有一個腳本解析XML資料並將其放入一個類別物件中。 _MV_WRITE_._MV_SEP_._MV_SEP_.$this->mvKey._MV_SEP_.$this->mvObj->toString()._MV_SEP_這部分都是正確的,除了$item->toString()回傳的是空白而不是正確的字串值。
在這些程式碼中是否有任何在PHP 5.4中有效但在PHP 7.4中無效的內容?以下是有問題的程式碼。
主要腳本
<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>
XML Parser
<?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 } ?>
以下是在PHP 5.4中的正確回傳值
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��
以下是我在PHP 7.4中得到的結果:
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
XML解析器應該是沒問題的,因為傳回的陣列是相同的。真正的問題在於getFormattedItem()方法,它實際上只是涉及extract()方法。已經嘗試在各個位置添加列印語句,但似乎無法確定哪個語句導致了問題。
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)。