Add psalm config

Author: GromNaN

composer.json

@@ -2,6 +2,7 @@
   "name": "mongodb/docs-php-library",
   "description": "MongoDB PHP Library Documentation",
   "require": {
+    "ext-mongodb": "^1.19",
     "mongodb/mongodb": "^1.19"
   },
   "require-dev": {

psalm-baseline.xml

@@ -0,0 +1,57 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<files psalm-version="5.25.0@01a8eb06b9e9cc6cfb6a320bf9fb14331919d505">
+  <file src="source/examples/aws-lambda/index.php">
+    <MissingFile>
+      <code><![CDATA[require_once __DIR__ . '/vendor/autoload.php']]></code>
+    </MissingFile>
+    <MixedAssignment>
+      <code><![CDATA[$planet]]></code>
+    </MixedAssignment>
+    <PossiblyFalseArgument>
+      <code><![CDATA[$uri]]></code>
+    </PossiblyFalseArgument>
+  </file>
+  <file src="source/examples/codecs/handling-data-types/DateTimeCodec.php">
+    <MissingTemplateParam>
+      <code><![CDATA[DecodeIfSupported]]></code>
+      <code><![CDATA[EncodeIfSupported]]></code>
+    </MissingTemplateParam>
+    <MixedAssignment>
+      <code><![CDATA[$dateTime]]></code>
+    </MixedAssignment>
+    <MixedMethodCall>
+      <code><![CDATA[get]]></code>
+      <code><![CDATA[get]]></code>
+      <code><![CDATA[getName]]></code>
+      <code><![CDATA[getTimezone]]></code>
+      <code><![CDATA[setTimeZone]]></code>
+      <code><![CDATA[toDateTime]]></code>
+    </MixedMethodCall>
+  </file>
+  <file src="source/examples/codecs/handling-documents/disabling-codec.php">
+    <MixedMethodCall>
+      <code><![CDATA[aggregate]]></code>
+      <code><![CDATA[findOne]]></code>
+    </MixedMethodCall>
+    <PossiblyUndefinedVariable>
+      <code><![CDATA[$filter]]></code>
+      <code><![CDATA[$pipeline]]></code>
+    </PossiblyUndefinedVariable>
+    <UndefinedGlobalVariable>
+      <code><![CDATA[$collection]]></code>
+      <code><![CDATA[$collection]]></code>
+    </UndefinedGlobalVariable>
+  </file>
+  <file src="source/examples/codecs/handling-embedded-documents/AddressCodec.php">
+    <MissingTemplateParam>
+      <code><![CDATA[DecodeIfSupported]]></code>
+      <code><![CDATA[EncodeIfSupported]]></code>
+    </MissingTemplateParam>
+    <MixedMethodCall>
+      <code><![CDATA[get]]></code>
+      <code><![CDATA[get]]></code>
+      <code><![CDATA[get]]></code>
+      <code><![CDATA[get]]></code>
+    </MixedMethodCall>
+  </file>
+</files>

psalm.xml

@@ -0,0 +1,37 @@
+<?xml version="1.0"?>
+<psalm
+        errorLevel="1"
+        errorBaseline="psalm-baseline.xml"
+        resolveFromConfigFile="true"
+        findUnusedBaselineEntry="true"
+        findUnusedCode="false"
+        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+        xmlns="https://getpsalm.org/schema/config"
+        xsi:schemaLocation="https://getpsalm.org/schema/config vendor/vimeo/psalm/config.xsd"
+>
+    <projectFiles>
+        <directory name="source/examples" />
+        <ignoreFiles>
+            <directory name="vendor" />
+        </ignoreFiles>
+    </projectFiles>
+<!--
+    <stubs>
+        <file name="stubs/BSON/Document.stub.php"/>
+        <file name="stubs/BSON/Iterator.stub.php"/>
+        <file name="stubs/BSON/PackedArray.stub.php"/>
+    </stubs>
+-->
+    <issueHandlers>
+        <!-- This is often the result of type checks due to missing native types -->
+        <DocblockTypeContradiction errorLevel="info" />
+
+        <!-- If the result of getenv is falsy, using the default URI is fine -->
+        <RiskyTruthyFalsyComparison errorLevel="suppress"/>
+
+        <!-- The same class can be defined in multiple examples -->
+        <DuplicateClass errorLevel="suppress" />
+        <MixedArgument errorLevel="suppress" />
+        <MixedPropertyFetch errorLevel="suppress" />
+    </issueHandlers>
+</psalm>