Add missing PHP options (#4588)

Author: stayallive

src/platforms/common/configuration/options.mdx

@@ -278,6 +278,12 @@ A path to an alternative CA bundle file in PEM-format.
 
 </ConfigKey>
 
+<ConfigKey name="context-lines" supported={["php"]}>
+
+The number of context lines for each frame in the stacktrace when loading a file.
+
+</ConfigKey>
+
 <ConfigKey name="frame-context-lines" supported={["node"]}>
 
 The number of context lines for each frame when loading a file.
@@ -409,6 +415,12 @@ Controls how many seconds to wait before shutting down. Sentry SDKs send events
 
 </ConfigKey>
 
+<ConfigKey name="send-attempts" supported={["php"]}>
+
+Controls how many times the SDK will attempt to send an event to Sentry. The default is `3`.
+
+</ConfigKey>
+
 </PlatformSection>
 
 <PlatformSection supported={["node", "javascript", "python", "php", "dotnet", "java", "ruby", "go", "react-native", "android", "dotnet"]}>