diff --git a/run-tests.php b/run-tests.php
index 9c9c1bc3..2d714ac6 100755
--- a/run-tests.php
+++ b/run-tests.php
@@ -1169,8 +1169,6 @@ function system_with_timeout(
         $descriptorspec[2] = ['pipe', 'w'];
     }
 
-    var_dump($commandline);
-
     $proc = proc_open($commandline, $descriptorspec, $pipes, TEST_PHP_SRCDIR, $bin_env, ['suppress_errors' => true]);
 
     if (!$proc) {
diff --git a/src/Php/Translator.php b/src/Php/Translator.php
index d4ed5d23..a62676a4 100644
--- a/src/Php/Translator.php
+++ b/src/Php/Translator.php
@@ -24,6 +24,11 @@ class Translator extends \PhpAot\Core\Translator
     private string $phpxDir = '~/workspace/projects/phpx';
     protected string $lang = 'PHP';
     private array $scope = [];
+    /**
+     * 插入到语句之前
+     * @var array
+     */
+    private array $beforeStmtLines = [];
     private int $tmpVarIndex = 0;
     // 需要插入到函数头部的变量定义代码
     private array $definitions = [];
@@ -51,6 +56,8 @@ class Translator extends \PhpAot\Core\Translator
     const string PREFIX = 'php_';
     private string $rootPath;
     private int $debugLine = 0;
+    // 回归赋值
+    private bool $regressionDetection = false;
 
 
     public function __construct(string $rootPath)
@@ -230,6 +237,13 @@ class Translator extends \PhpAot\Core\Translator
                 return '"' . $this->escapeString($expr->value) . '"';
             case 'Expr_ConstFetch':
                 return $this->parseConstFetch($expr);
+            case 'Expr_Assign':
+                if ($this->regressionDetection) {
+                    $var = $this->parseIdentifier($expr->var);
+                    $this->beforeStmtLines[] = $this->parseExpr($expr) . ";\n";
+                    return '(' . $var . ')';
+                }
+                return $this->parseExpr($expr);
             default:
                 return $this->parseExpr($expr);
         }
@@ -262,56 +276,61 @@ class Translator extends \PhpAot\Core\Translator
         $lines = [];
         foreach ($stmts as $v) {
             $class = $v->getType();
+            $this->beforeStmtLines = [];
             $this->writeLog('Line ' . $this->getLine($v) . ': ' . $class);
             switch ($class) {
                 case 'Stmt_Expression':
-                    $lines[] = $this->parseExpr($v->expr) . ';';
+                    $result = $this->parseExpr($v->expr) . ';';
                     break;
                 case 'Stmt_Echo':
-                    $this->parseEcho($v, $lines);
+                    $result = $this->parseEcho($v);
                     break;
                 case 'Stmt_Return':
-                    $lines[] = $this->parseReturn($v) . ';';
+                    $result = $this->parseReturn($v) . ';';
                     break;
                 case 'Stmt_For':
-                    $lines[] = $this->parseFor($v);
+                    $result = $this->parseFor($v);
                     break;
                 case 'Stmt_Foreach':
-                    $lines[] = $this->parseForeach($v);
+                    $result = $this->parseForeach($v);
                     break;
                 case 'Stmt_Switch':
-                    $lines[] = $this->parseSwitch($v);
+                    $result = $this->parseSwitch($v);
                     break;
                 case 'Stmt_While':
-                    $lines[] = $this->parseWhile($v);
+                    $result = $this->parseWhile($v);
                     break;
                 case 'Stmt_Do':
-                    $lines[] = $this->parseDo($v);
+                    $result = $this->parseDo($v);
                     break;
                 case 'Stmt_If':
-                    $lines[] = $this->parseIf($v);
+                    $result = $this->parseIf($v);
                     break;
                 case 'Stmt_Break':
-                    $lines[] = 'break;';
+                    $result = $this->parseBreak($v);
                     break;
                 case 'Stmt_Continue':
-                    $lines[] = 'continue;';
+                    $result = 'continue;';
                     break;
                 case 'Stmt_Global':
-                    $lines[] = $this->parseGlobal($v);
+                    $result = $this->parseGlobal($v);
                     break;
                 case 'Stmt_Static':
-                    $lines[] = $this->parseStatic($v);
+                    $result = $this->parseStatic($v);
                     break;
                 case 'Stmt_Unset':
-                    $lines[] = $this->parseUnset($v);
+                    $result = $this->parseUnset($v);
                     break;
                 default:
                     abort($v);
             }
+            if ($this->beforeStmtLines) {
+                $lines = array_merge($lines, $this->beforeStmtLines);
+            }
+            $lines[] = $result;
         }
-        $code = '';
 
+        $code = '';
         foreach ($lines as $line) {
             $code .= $this->getIndent() . $line . PHP_EOL;
         }
@@ -509,11 +528,12 @@ class Translator extends \PhpAot\Core\Translator
         }
     }
 
-    private function parseEcho(mixed $v, &$lines): void
+    private function parseEcho(mixed $v): string
     {
         foreach ($v->exprs as $expr) {
             $lines[] = 'php::echo(' . $this->parseExpr($expr) . ');';
         }
+        return implode("\n" . $this->getIndent(), $lines);
     }
 
     private function parseBinaryOp($left, $right, $op): string
@@ -733,8 +753,10 @@ class Translator extends \PhpAot\Core\Translator
 
     private function parseBinaryOpConcat(mixed $expr): string
     {
+        $this->regressionDetection = true;
         $left = $this->parseIdentifier($expr->left);
         $right = $this->parseIdentifier($expr->right);
+        $this->regressionDetection = false;
 
         return 'php::concat(' . $left . ', ' . $right . ')';
     }
@@ -1407,4 +1429,16 @@ class Translator extends \PhpAot\Core\Translator
     {
         return '"' . $this->escapeString($this->dir) . '"';
     }
+
+    private function parseBreak(mixed $v): string
+    {
+        $num = $v->num;
+        if ($num) {
+            $value = $this->parseIdentifier($num);
+            if ($value > 1) {
+                abort($v);
+            }
+        }
+        return 'break;';
+    }
 }
diff --git a/tests/core/lang/020.phpt b/tests/core/lang/020.phpt
new file mode 100644
index 00000000..97c928d2
--- /dev/null
+++ b/tests/core/lang/020.phpt
@@ -0,0 +1,76 @@
+--TEST--
+Switch test 1
+--FILE--
+<?php
+
+$i="abc";
+
+for ($j=0; $j<10; $j++) {
+switch (1) {
+  case 1:
+    echo "In branch 1\n";
+    switch ($i) {
+        case "ab":
+            echo "This doesn't work... :(\n";
+            break;
+        case "abcd":
+            echo "This works!\n";
+            break;
+        case "blah":
+            echo "Hmmm, no worki\n";
+            break;
+        default:
+            echo "Inner default...\n";
+    }
+    for ($blah=0; $blah<200; $blah++) {
+      if ($blah==100) {
+        echo "blah=$blah\n";
+      }
+    }
+    break;
+  case 2:
+    echo "In branch 2\n";
+    break;
+  case $i:
+    echo "In branch \$i\n";
+    break;
+  case 4:
+    echo "In branch 4\n";
+    break;
+  default:
+    echo "Hi, I'm default\n";
+    break;
+ }
+}
+?>
+--EXPECT--
+In branch 1
+Inner default...
+blah=100
+In branch 1
+Inner default...
+blah=100
+In branch 1
+Inner default...
+blah=100
+In branch 1
+Inner default...
+blah=100
+In branch 1
+Inner default...
+blah=100
+In branch 1
+Inner default...
+blah=100
+In branch 1
+Inner default...
+blah=100
+In branch 1
+Inner default...
+blah=100
+In branch 1
+Inner default...
+blah=100
+In branch 1
+Inner default...
+blah=100
diff --git a/tests/core/lang/021.phpt b/tests/core/lang/021.phpt
new file mode 100644
index 00000000..517f3215
--- /dev/null
+++ b/tests/core/lang/021.phpt
@@ -0,0 +1,44 @@
+--TEST--
+Switch test 2
+--SKIPIF--
+<?php die("skip");?>
+--FILE--
+<?php
+
+for ($i=0; $i<=5; $i++)
+{
+  echo "i=$i\n";
+
+  switch($i) {
+    case 0:
+      echo "In branch 0\n";
+      break;
+    case 1:
+      echo "In branch 1\n";
+      break;
+    case 2:
+      echo "In branch 2\n";
+      break;
+    case 3:
+      echo "In branch 3\n";
+      break 2;
+    case 4:
+      echo "In branch 4\n";
+      break;
+    default:
+      echo "In default\n";
+      break;
+  }
+}
+echo "hi\n";
+?>
+--EXPECT--
+i=0
+In branch 0
+i=1
+In branch 1
+i=2
+In branch 2
+i=3
+In branch 3
+hi
diff --git a/tests/core/lang/022.phpt b/tests/core/lang/022.phpt
new file mode 100644
index 00000000..6b2c5ee0
--- /dev/null
+++ b/tests/core/lang/022.phpt
@@ -0,0 +1,65 @@
+--TEST--
+Switch test 3
+--FILE--
+<?php
+
+function switchtest ($i, $j)
+{
+    switch ($i) {
+        case 0:
+                switch($j) {
+                    case 0:
+                        echo "zero";
+                        break;
+                    case 1:
+                        echo "one";
+                        break;
+                    default:
+                        echo $j;
+                        break;
+                }
+                echo "\n";
+                break;
+        default:
+                echo "Default taken\n";
+    }
+}
+function main() {
+    for ($i=0; $i<3; $i++) {
+      for ($k=0; $k<10; $k++) {
+        switchtest (0,$k);
+      }
+    }
+}
+?>
+--EXPECT--
+zero
+one
+2
+3
+4
+5
+6
+7
+8
+9
+zero
+one
+2
+3
+4
+5
+6
+7
+8
+9
+zero
+one
+2
+3
+4
+5
+6
+7
+8
+9
diff --git a/tests/core/lang/023.phpt b/tests/core/lang/023.phpt
new file mode 100644
index 00000000..bfb427bb
--- /dev/null
+++ b/tests/core/lang/023.phpt
@@ -0,0 +1,251 @@
+--TEST--
+Regression test
+--INI--
+date.timezone=UTC
+--FILE--
+<?php
+include __DIR__.("/023-1.inc");
+
+$wedding_timestamp = mktime(20,0,0,8,31,1997);
+$time_left=$wedding_timestamp-time();
+
+if ($time_left>0) {
+  $days = $time_left/(24*3600);
+  $time_left -= $days*24*3600;
+  $hours = $time_left/3600;
+  $time_left -= $hours*3600;
+  $minutes = $time_left/60;
+  echo "Limor Ullmann is getting married on ".($wedding_date=date("l, F dS, Y",$wedding_timestamp)).",\nwhich is $days days, $hours hours and $minutes minutes from now.\n";
+  echo "Her hashed wedding date is $wedding_date.\n";
+} else {
+  echo "Limor Ullmann is now Limor Baruch :I\n";
+}
+?>
+--EXPECT--
+<html>
+<head>
+
+*** Testing assignments and variable aliasing: ***<br>
+This should read "blah": blah<br>
+This should read "this is nifty": this is nifty<br>
+*************************************************<br>
+
+*** Testing integer operators ***<br>
+Correct result - 8:  8<br>
+Correct result - 8:  8<br>
+Correct result - 2:  2<br>
+Correct result - -2:  -2<br>
+Correct result - 15:  15<br>
+Correct result - 15:  15<br>
+Correct result - 2:  2<br>
+Correct result - 3:  3<br>
+*********************************<br>
+
+*** Testing real operators ***<br>
+Correct result - 8:  8<br>
+Correct result - 8:  8<br>
+Correct result - 2:  2<br>
+Correct result - -2:  -2<br>
+Correct result - 15:  15<br>
+Correct result - 15:  15<br>
+Correct result - 2:  2<br>
+Correct result - 3:  3<br>
+*********************************<br>
+
+*** Testing if/elseif/else control ***<br>
+
+This  works<br>
+this_still_works<br>
+should_print<br>
+
+
+*** Seriously nested if's test ***<br>
+** spelling correction by kluzz **
+Only two lines of text should follow:<br>
+this should be displayed. should be:  $i=1, $j=0.  is:  $i=1, $j=0<br>
+this is supposed to be displayed. should be:  $i=2, $j=4.  is:  $i=2, $j=4<br>
+3 loop iterations should follow:<br>
+2 4<br>
+3 4<br>
+4 4<br>
+**********************************<br>
+
+*** C-style else-if's ***<br>
+This should be displayed<br>
+*************************<br>
+
+*** WHILE tests ***<br>
+0 is smaller than 20<br>
+1 is smaller than 20<br>
+2 is smaller than 20<br>
+3 is smaller than 20<br>
+4 is smaller than 20<br>
+5 is smaller than 20<br>
+6 is smaller than 20<br>
+7 is smaller than 20<br>
+8 is smaller than 20<br>
+9 is smaller than 20<br>
+10 is smaller than 20<br>
+11 is smaller than 20<br>
+12 is smaller than 20<br>
+13 is smaller than 20<br>
+14 is smaller than 20<br>
+15 is smaller than 20<br>
+16 is smaller than 20<br>
+17 is smaller than 20<br>
+18 is smaller than 20<br>
+19 is smaller than 20<br>
+20 equals 20<br>
+21 is greater than 20<br>
+22 is greater than 20<br>
+23 is greater than 20<br>
+24 is greater than 20<br>
+25 is greater than 20<br>
+26 is greater than 20<br>
+27 is greater than 20<br>
+28 is greater than 20<br>
+29 is greater than 20<br>
+30 is greater than 20<br>
+31 is greater than 20<br>
+32 is greater than 20<br>
+33 is greater than 20<br>
+34 is greater than 20<br>
+35 is greater than 20<br>
+36 is greater than 20<br>
+37 is greater than 20<br>
+38 is greater than 20<br>
+39 is greater than 20<br>
+*******************<br>
+
+
+*** Nested WHILEs ***<br>
+Each array variable should be equal to the sum of its indices:<br>
+${test00}[0] = 0<br>
+${test00}[1] = 1<br>
+${test00}[2] = 2<br>
+${test01}[0] = 1<br>
+${test01}[1] = 2<br>
+${test01}[2] = 3<br>
+${test02}[0] = 2<br>
+${test02}[1] = 3<br>
+${test02}[2] = 4<br>
+${test10}[0] = 1<br>
+${test10}[1] = 2<br>
+${test10}[2] = 3<br>
+${test11}[0] = 2<br>
+${test11}[1] = 3<br>
+${test11}[2] = 4<br>
+${test12}[0] = 3<br>
+${test12}[1] = 4<br>
+${test12}[2] = 5<br>
+${test20}[0] = 2<br>
+${test20}[1] = 3<br>
+${test20}[2] = 4<br>
+${test21}[0] = 3<br>
+${test21}[1] = 4<br>
+${test21}[2] = 5<br>
+${test22}[0] = 4<br>
+${test22}[1] = 5<br>
+${test22}[2] = 6<br>
+*********************<br>
+
+*** hash test... ***<br>
+commented out...
+**************************<br>
+
+*** Hash resizing test ***<br>
+ba<br>
+baa<br>
+baaa<br>
+baaaa<br>
+baaaaa<br>
+baaaaaa<br>
+baaaaaaa<br>
+baaaaaaaa<br>
+baaaaaaaaa<br>
+baaaaaaaaaa<br>
+ba<br>
+10<br>
+baa<br>
+9<br>
+baaa<br>
+8<br>
+baaaa<br>
+7<br>
+baaaaa<br>
+6<br>
+baaaaaa<br>
+5<br>
+baaaaaaa<br>
+4<br>
+baaaaaaaa<br>
+3<br>
+baaaaaaaaa<br>
+2<br>
+baaaaaaaaaa<br>
+1<br>
+**************************<br>
+
+
+*** break/continue test ***<br>
+$i should go from 0 to 2<br>
+$j should go from 3 to 4, and $q should go from 3 to 4<br>
+  $j=3<br>
+    $q=3<br>
+    $q=4<br>
+  $j=4<br>
+    $q=3<br>
+    $q=4<br>
+$j should go from 0 to 2<br>
+  $j=0<br>
+  $j=1<br>
+  $j=2<br>
+$k should go from 0 to 2<br>
+    $k=0<br>
+    $k=1<br>
+    $k=2<br>
+$i=0<br>
+$j should go from 3 to 4, and $q should go from 3 to 4<br>
+  $j=3<br>
+    $q=3<br>
+    $q=4<br>
+  $j=4<br>
+    $q=3<br>
+    $q=4<br>
+$j should go from 0 to 2<br>
+  $j=0<br>
+  $j=1<br>
+  $j=2<br>
+$k should go from 0 to 2<br>
+    $k=0<br>
+    $k=1<br>
+    $k=2<br>
+$i=1<br>
+$j should go from 3 to 4, and $q should go from 3 to 4<br>
+  $j=3<br>
+    $q=3<br>
+    $q=4<br>
+  $j=4<br>
+    $q=3<br>
+    $q=4<br>
+$j should go from 0 to 2<br>
+  $j=0<br>
+  $j=1<br>
+  $j=2<br>
+$k should go from 0 to 2<br>
+    $k=0<br>
+    $k=1<br>
+    $k=2<br>
+$i=2<br>
+***********************<br>
+
+*** Nested file include test ***<br>
+<html>
+This is Finish.phtml.  This file is supposed to be included
+from regression_test.phtml.  This is normal HTML.
+and this is PHP code, 2+2=4
+</html>
+********************************<br>
+
+Tests completed.<br>
+Limor Ullmann is now Limor Baruch :I