diff --git a/ext/standard/Module.php b/ext/standard/Module.php
index 33bfbec7d31..bfcb897dc5b 100755
--- a/ext/standard/Module.php
+++ b/ext/standard/Module.php
@@ -20,6 +20,7 @@ public function getFunctions(): array
     {
         return [
             $this->parseAndCompileFunction('str_repeat', __DIR__.'/str_repeat.php'),
+            $this->parseAndCompileFunction('decbin', __DIR__.'/decbin.php'),
             new abs(),
             new ceil(),
             new floor(),
@@ -40,6 +41,9 @@ public function getFunctions(): array
             new strcmp(),
             new dechex(),
             new hexdec(),
+            new decoct(),
+            new octdec(),
+            new bindec(),
         ];
     }
 
diff --git a/ext/standard/bindec.php b/ext/standard/bindec.php
new file mode 100644
index 00000000000..4b8fd90f587
--- /dev/null
+++ b/ext/standard/bindec.php
@@ -0,0 +1,69 @@
+<?php
+
+declare(strict_types=1);
+
+/**
+ * This file is part of PHP-Compiler, a PHP CFG Compiler for PHP code
+ *
+ * @copyright 2015 Anthony Ferrara. All rights reserved
+ * @license MIT See LICENSE at the root of the project for more info
+ */
+
+namespace PHPCompiler\ext\standard;
+
+use PHPCompiler\Frame;
+use PHPCompiler\Func\Internal;
+use PHPCompiler\JIT\Context;
+use PHPCompiler\JIT\Variable as JITVariable;
+use PHPCompiler\VM\Variable;
+use PHPLLVM\Value;
+
+/**
+ * bindec() for string arguments (subset of PHP standard library).
+ */
+final class bindec extends Internal
+{
+    public function execute(Frame $frame): void
+    {
+        if (1 !== count($frame->calledArgs)) {
+            throw new \LogicException('bindec() requires exactly one argument');
+        }
+        $v = $frame->calledArgs[0]->resolveIndirect();
+        if (null === $frame->returnVar) {
+            return;
+        }
+        if (Variable::TYPE_STRING !== $v->type) {
+            throw new \LogicException('bindec() only supports strings in this compiler build');
+        }
+        $frame->returnVar->int((int) \bindec($v->toString()));
+    }
+
+    public Context $context;
+
+    public function call(Context $context, JITVariable ...$args): Value
+    {
+        $this->context = $context;
+        if (1 !== count($args)) {
+            throw new \LogicException('bindec() requires exactly one argument');
+        }
+        if (JITVariable::TYPE_STRING !== $args[0]->type) {
+            throw new \LogicException('bindec() only supports strings in this compiler build');
+        }
+        $ptr = $this->stringDataPtr($context, $context->helper->loadValue($args[0]));
+        $endPtr = $context->getTypeFromString('int8**')->constPointerNull();
+        $base = $context->getTypeFromString('int32')->constInt(2, false);
+        $fn = $context->lookupFunction('strtol');
+        $raw = $context->builder->call($fn, $ptr, $endPtr, $base);
+        $i64 = $context->getTypeFromString('int64');
+
+        return $context->builder->trunc($raw, $i64);
+    }
+
+    private function stringDataPtr(Context $context, Value $strPtr): Value
+    {
+        $structName = $strPtr->typeOf()->getElementType()->getName();
+        $off = $context->structFieldMap[$structName]['value'];
+
+        return $context->builder->structGep($strPtr, $off);
+    }
+}
diff --git a/ext/standard/decbin.php b/ext/standard/decbin.php
new file mode 100644
index 00000000000..48352c05518
--- /dev/null
+++ b/ext/standard/decbin.php
@@ -0,0 +1,28 @@
+<?php
+
+declare(strict_types=1);
+
+/**
+ * This file is part of PHP-Compiler, a PHP CFG Compiler for PHP code
+ *
+ * @copyright 2015 Anthony Ferrara. All rights reserved
+ * @license MIT See LICENSE at the root of the project for more info
+ */
+
+namespace PHPCompiler\ext\standard;
+
+/**
+ * decbin() implemented as compiled PHP (subset: non-negative integers).
+ */
+function decbin(int $num): string
+{
+    if (0 === $num) {
+        return '0';
+    }
+    $result = '';
+    for ($n = $num; $n > 0; $n = intval($n / 2)) {
+        $result = strval($n % 2) . $result;
+    }
+
+    return $result;
+}
diff --git a/ext/standard/decoct.php b/ext/standard/decoct.php
new file mode 100644
index 00000000000..73dcc57c745
--- /dev/null
+++ b/ext/standard/decoct.php
@@ -0,0 +1,85 @@
+<?php
+
+declare(strict_types=1);
+
+/**
+ * This file is part of PHP-Compiler, a PHP CFG Compiler for PHP code
+ *
+ * @copyright 2015 Anthony Ferrara. All rights reserved
+ * @license MIT See LICENSE at the root of the project for more info
+ */
+
+namespace PHPCompiler\ext\standard;
+
+use PHPCompiler\Frame;
+use PHPCompiler\Func\Internal;
+use PHPCompiler\JIT\Context;
+use PHPCompiler\JIT\Variable as JITVariable;
+use PHPCompiler\VM\Variable;
+use PHPLLVM\Value;
+
+/**
+ * decoct() for integer arguments (subset of PHP standard library).
+ */
+final class decoct extends Internal
+{
+    public function execute(Frame $frame): void
+    {
+        if (1 !== count($frame->calledArgs)) {
+            throw new \LogicException('decoct() requires exactly one argument');
+        }
+        $v = $frame->calledArgs[0]->resolveIndirect();
+        if (null === $frame->returnVar) {
+            return;
+        }
+        if (Variable::TYPE_INTEGER !== $v->type) {
+            throw new \LogicException('decoct() only supports integers in this compiler build');
+        }
+        $frame->returnVar->string(\decoct($v->toInt()));
+    }
+
+    public Context $context;
+
+    public function call(Context $context, JITVariable ...$args): Value
+    {
+        $this->context = $context;
+        if (1 !== count($args)) {
+            throw new \LogicException('decoct() requires exactly one argument');
+        }
+        if (JITVariable::TYPE_NATIVE_LONG !== $args[0]->type) {
+            throw new \LogicException('decoct() only supports integers in this compiler build');
+        }
+
+        return $this->formatToString($context, $context->helper->loadValue($args[0]), '%o');
+    }
+
+    private function formatToString(Context $context, Value $value, string $format): Value
+    {
+        $sizeT = $context->getTypeFromString('size_t');
+        $charPtr = $context->getTypeFromString('char*');
+        $i64 = $context->getTypeFromString('int64');
+        $bufSize = $sizeT->constInt(64, false);
+        $buf = $context->builder->call($context->lookupFunction('__mm__malloc'), $bufSize);
+        $bufChar = $context->builder->pointerCast($buf, $charPtr);
+        $fmt = $context->builder->pointerCast(
+            $context->constantFromString($format),
+            $charPtr
+        );
+        $written = $context->builder->call(
+            $context->lookupFunction('snprintf'),
+            $bufChar,
+            $bufSize,
+            $fmt,
+            $value
+        );
+        $len = $context->builder->zExt($written, $i64);
+        $str = $context->builder->call(
+            $context->lookupFunction('__string__init'),
+            $len,
+            $bufChar
+        );
+        $context->builder->call($context->lookupFunction('__mm__free'), $buf);
+
+        return $str;
+    }
+}
diff --git a/ext/standard/octdec.php b/ext/standard/octdec.php
new file mode 100644
index 00000000000..7919488009f
--- /dev/null
+++ b/ext/standard/octdec.php
@@ -0,0 +1,69 @@
+<?php
+
+declare(strict_types=1);
+
+/**
+ * This file is part of PHP-Compiler, a PHP CFG Compiler for PHP code
+ *
+ * @copyright 2015 Anthony Ferrara. All rights reserved
+ * @license MIT See LICENSE at the root of the project for more info
+ */
+
+namespace PHPCompiler\ext\standard;
+
+use PHPCompiler\Frame;
+use PHPCompiler\Func\Internal;
+use PHPCompiler\JIT\Context;
+use PHPCompiler\JIT\Variable as JITVariable;
+use PHPCompiler\VM\Variable;
+use PHPLLVM\Value;
+
+/**
+ * octdec() for string arguments (subset of PHP standard library).
+ */
+final class octdec extends Internal
+{
+    public function execute(Frame $frame): void
+    {
+        if (1 !== count($frame->calledArgs)) {
+            throw new \LogicException('octdec() requires exactly one argument');
+        }
+        $v = $frame->calledArgs[0]->resolveIndirect();
+        if (null === $frame->returnVar) {
+            return;
+        }
+        if (Variable::TYPE_STRING !== $v->type) {
+            throw new \LogicException('octdec() only supports strings in this compiler build');
+        }
+        $frame->returnVar->int((int) \octdec($v->toString()));
+    }
+
+    public Context $context;
+
+    public function call(Context $context, JITVariable ...$args): Value
+    {
+        $this->context = $context;
+        if (1 !== count($args)) {
+            throw new \LogicException('octdec() requires exactly one argument');
+        }
+        if (JITVariable::TYPE_STRING !== $args[0]->type) {
+            throw new \LogicException('octdec() only supports strings in this compiler build');
+        }
+        $ptr = $this->stringDataPtr($context, $context->helper->loadValue($args[0]));
+        $endPtr = $context->getTypeFromString('int8**')->constPointerNull();
+        $base = $context->getTypeFromString('int32')->constInt(8, false);
+        $fn = $context->lookupFunction('strtol');
+        $raw = $context->builder->call($fn, $ptr, $endPtr, $base);
+        $i64 = $context->getTypeFromString('int64');
+
+        return $context->builder->trunc($raw, $i64);
+    }
+
+    private function stringDataPtr(Context $context, Value $strPtr): Value
+    {
+        $structName = $strPtr->typeOf()->getElementType()->getName();
+        $off = $context->structFieldMap[$structName]['value'];
+
+        return $context->builder->structGep($strPtr, $off);
+    }
+}
diff --git a/test/compliance/cases/stdlib/bindec.phpt b/test/compliance/cases/stdlib/bindec.phpt
new file mode 100644
index 00000000000..2c9b909ee73
--- /dev/null
+++ b/test/compliance/cases/stdlib/bindec.phpt
@@ -0,0 +1,13 @@
+--TEST--
+stdlib bindec() for binary strings
+--FILE--
+<?php
+echo bindec('0'), "\n";
+echo bindec('1010'), "\n";
+echo bindec('11111111'), "\n";
+echo bindec('1000'), "\n";
+--EXPECT--
+0
+10
+255
+8
diff --git a/test/compliance/cases/stdlib/decbin.phpt b/test/compliance/cases/stdlib/decbin.phpt
new file mode 100644
index 00000000000..4e92755dbbd
--- /dev/null
+++ b/test/compliance/cases/stdlib/decbin.phpt
@@ -0,0 +1,13 @@
+--TEST--
+stdlib decbin() for non-negative integers
+--FILE--
+<?php
+echo decbin(0), "\n";
+echo decbin(10), "\n";
+echo decbin(255), "\n";
+echo decbin(8), "\n";
+--EXPECT--
+0
+1010
+11111111
+1000
diff --git a/test/compliance/cases/stdlib/decoct.phpt b/test/compliance/cases/stdlib/decoct.phpt
new file mode 100644
index 00000000000..a086f77b1c5
--- /dev/null
+++ b/test/compliance/cases/stdlib/decoct.phpt
@@ -0,0 +1,13 @@
+--TEST--
+stdlib decoct() for non-negative integers
+--FILE--
+<?php
+echo decoct(0), "\n";
+echo decoct(8), "\n";
+echo decoct(63), "\n";
+echo decoct(512), "\n";
+--EXPECT--
+0
+10
+77
+1000
diff --git a/test/compliance/cases/stdlib/octdec.phpt b/test/compliance/cases/stdlib/octdec.phpt
new file mode 100644
index 00000000000..654bd25c231
--- /dev/null
+++ b/test/compliance/cases/stdlib/octdec.phpt
@@ -0,0 +1,13 @@
+--TEST--
+stdlib octdec() for octal strings
+--FILE--
+<?php
+echo octdec('0'), "\n";
+echo octdec('10'), "\n";
+echo octdec('77'), "\n";
+echo octdec('1000'), "\n";
+--EXPECT--
+0
+8
+63
+512
diff --git a/test/real/cases/stdlib_radix_casts.phpt b/test/real/cases/stdlib_radix_casts.phpt
new file mode 100644
index 00000000000..5f99dafe15d
--- /dev/null
+++ b/test/real/cases/stdlib_radix_casts.phpt
@@ -0,0 +1,15 @@
+--TEST--
+Integration: decbin, bindec, decoct, octdec round-trips
+--FILE--
+<?php
+echo decbin(bindec('1010')), "\n";
+echo decoct(octdec('77')), "\n";
+echo bindec(decbin(255)), "\n";
+echo octdec(decoct(512)), "\n";
+echo strlen(decbin(10)), "\n";
+--EXPECT--
+1010
+77
+255
+512
+4