diff --git a/src/types/array.rs b/src/types/array.rs
index 602eda7d4..db89e884b 100644
--- a/src/types/array.rs
+++ b/src/types/array.rs
@@ -1,16 +1,6 @@
 //! Represents an array in PHP. As all arrays in PHP are associative arrays,
 //! they are represented by hash tables.
 
-use std::{
-    collections::HashMap,
-    convert::{TryFrom, TryInto},
-    ffi::CString,
-    fmt::{Debug, Display},
-    iter::FromIterator,
-    ptr,
-    str::FromStr,
-};
-
 use crate::{
     boxed::{ZBox, ZBoxable},
     convert::{FromZval, IntoZval},
@@ -27,6 +17,15 @@ use crate::{
     flags::DataType,
     types::Zval,
 };
+use std::{
+    collections::{BTreeMap, HashMap},
+    convert::{TryFrom, TryInto},
+    ffi::CString,
+    fmt::{Debug, Display},
+    iter::FromIterator,
+    ptr,
+    str::FromStr,
+};
 
 /// A PHP hashtable.
 ///
@@ -1288,6 +1287,76 @@ where
     }
 }
 
+///////////////////////////////////////////
+// BTreeMap
+///////////////////////////////////////////
+
+impl<'a, V> TryFrom<&'a ZendHashTable> for BTreeMap<String, V>
+where
+    V: FromZval<'a>,
+{
+    type Error = Error;
+
+    fn try_from(value: &'a ZendHashTable) -> Result<Self> {
+        let mut hm = BTreeMap::new();
+
+        for (key, val) in value {
+            hm.insert(
+                key.to_string(),
+                V::from_zval(val).ok_or_else(|| Error::ZvalConversion(val.get_type()))?,
+            );
+        }
+
+        Ok(hm)
+    }
+}
+
+impl<K, V> TryFrom<BTreeMap<K, V>> for ZBox<ZendHashTable>
+where
+    K: AsRef<str>,
+    V: IntoZval,
+{
+    type Error = Error;
+
+    fn try_from(value: BTreeMap<K, V>) -> Result<Self> {
+        let mut ht = ZendHashTable::with_capacity(
+            value.len().try_into().map_err(|_| Error::IntegerOverflow)?,
+        );
+
+        for (k, v) in value {
+            ht.insert(k.as_ref(), v)?;
+        }
+
+        Ok(ht)
+    }
+}
+
+impl<K, V> IntoZval for BTreeMap<K, V>
+where
+    K: AsRef<str>,
+    V: IntoZval,
+{
+    const TYPE: DataType = DataType::Array;
+    const NULLABLE: bool = false;
+
+    fn set_zval(self, zv: &mut Zval, _: bool) -> Result<()> {
+        let arr = self.try_into()?;
+        zv.set_hashtable(arr);
+        Ok(())
+    }
+}
+
+impl<'a, T> FromZval<'a> for BTreeMap<String, T>
+where
+    T: FromZval<'a>,
+{
+    const TYPE: DataType = DataType::Array;
+
+    fn from_zval(zval: &'a Zval) -> Option<Self> {
+        zval.array().and_then(|arr| arr.try_into().ok())
+    }
+}
+
 ///////////////////////////////////////////
 // Vec
 ///////////////////////////////////////////