update php spec compliance (#4664)

## Changes

Update PHP spec compliance matrix

For non-trivial changes, follow the [change proposal
process](https://github.com/open-telemetry/opentelemetry-specification/blob/main/CONTRIBUTING.md#proposing-a-change).

* [ ] Related issues #
* [ ] Related [OTEP(s)](https://github.com/open-telemetry/oteps) #
* [ ] Links to the prototypes (when adding or changing features)
* [ ]
[`CHANGELOG.md`](https://github.com/open-telemetry/opentelemetry-specification/blob/main/CHANGELOG.md)
file updated for non-trivial changes
* [ ] [Spec compliance
matrix](https://github.com/open-telemetry/opentelemetry-specification/blob/main/spec-compliance-matrix/template.yaml)
updated if necessary

Author: brettmc

spec-compliance-matrix.md

@@ -68,7 +68,7 @@ formats is required. Implementing more than one format is optional.
 | Unicode support for keys and string values |  | + | + | + | + | + | + | + | + | + | + | + |
 | [Span linking](specification/trace/api.md#specifying-links) | Optional | Go | Java | JS | Python | Ruby | Erlang | PHP | Rust | C++ | .NET | Swift |
 | Links can be recorded on span creation |  | + | + |  | + | + | + | + | + | + | + |  |
-| Links can be recorded after span creation |  | + |  |  | + |  |  |  |  | + | + |  |
+| Links can be recorded after span creation |  | + |  |  | + |  |  | + |  | + | + |  |
 | Links order is preserved |  | + | + |  | + | + | + | + | + | + | + |  |
 | [Span events](specification/trace/api.md#add-events) | Optional | Go | Java | JS | Python | Ruby | Erlang | PHP | Rust | C++ | .NET | Swift |
 | AddEvent |  | + | + | + | + | + | + | + | + | + | + | + |
@@ -80,7 +80,7 @@ formats is required. Implementing more than one format is optional.
 | [Sampling](specification/trace/sdk.md#sampling) | Optional | Go | Java | JS | Python | Ruby | Erlang | PHP | Rust | C++ | .NET | Swift |
 | Allow samplers to modify tracestate |  | + | + |  | + | + | + | + | + | + | + | + |
 | ShouldSample gets full parent Context |  | + | + | + | + | + | + | + | + | + | - | + |
-| Sampler: JaegerRemoteSampler |  | + | + |  |  |  |  |  | + |  |  |  |
+| Sampler: JaegerRemoteSampler |  | + | + |  |  |  |  | - | + |  |  |  |
 | [New Span ID created also for non-recording Spans](specification/trace/sdk.md#sdk-span-creation) |  | + | + |  | + | + | + | + | + | + | - | + |
 | [IdGenerators](specification/trace/sdk.md#id-generators) |  | + | + |  | + | + | + | + | + | + |  | + |
 | [SpanLimits](specification/trace/sdk.md#span-limits) | X | + | + |  | + | + | + | + |  | - |  | + |
@@ -114,7 +114,7 @@ formats is required. Implementing more than one format is optional.
 | `AsynchronousCounter` instrument is supported. |  | + | + | + | + | + | + | + | + | + | + |  |
 | `Histogram` instrument is supported. |  | + | + | + | + | + | + | + | + | + | + |  |
 | `AsynchronousGauge` instrument is supported. |  | + | + | + | + | + | + | + | + | + | + |  |
-| `Gauge` instrument is supported. |  | - | - | - | + | + | - | - | + | - | - |  |
+| `Gauge` instrument is supported. |  | - | - | - | + | + | - | + | + | - | - |  |
 | `UpDownCounter` instrument is supported. |  | + | + | + | + | + | + | + | + | + | + |  |
 | `AsynchronousUpDownCounter` instrument is supported. |  | + | + | + | + | + | + | + | + | + | + |  |
 | Instruments have `name` |  | + | + | + | + | + | + | + | + | + | + |  |
@@ -201,7 +201,7 @@ Disclaimer: this list of features is still a work in progress, please refer to t
 | Logger.Emit(LogRecord) |  |  | + |  | + | + |  | + |  | + | - |  |
 | Reuse Standard Attributes | X | + |  |  |  |  |  |  |  |  |  |  |
 | LogRecord.Set EventName |  | + |  |  |  |  |  |  | + | + |  |  |
-| Logger.Enabled | X | + |  |  |  |  |  |  | + | + |  |  |
+| Logger.Enabled | X | + |  |  |  |  |  | + | + | + |  |  |
 | SimpleLogRecordProcessor |  |  | + |  | + | + |  | + |  | + |  |  |
 | BatchLogRecordProcessor |  |  | + |  | + | + |  | + |  | + |  |  |
 | Can plug custom LogRecordProcessor |  |  | + |  | + | + |  | + |  | + |  |  |
@@ -259,7 +259,7 @@ Note: Support for environment variables is optional.
 | OTEL_LOG_LEVEL | - | - | + | [-][py1059] | + | - | + |  | - | - | - |
 | OTEL_PROPAGATORS | - | + |  | + | + | + | + | - | - | - | - |
 | OTEL_BSP_* | + | + | + | + | + | + | + | + | - | + | - |
-| OTEL_BLRP_* |  | + |  |  | + |  |  | + | - | + |  |
+| OTEL_BLRP_* |  | + |  |  | + |  | + | + | - | + |  |
 | OTEL_EXPORTER_OTLP_* | + | + |  | + | + | + | + | + | + | + | - |
 | OTEL_EXPORTER_ZIPKIN_* | - | + |  | + | + | - | + | - | - | + | - |
 | OTEL_TRACES_EXPORTER | - | + | + | + | + | + | + | - | - | - |  |
@@ -282,7 +282,7 @@ Note: Support for environment variables is optional.
 | OTEL_METRICS_EXEMPLAR_FILTER | - | + |  |  | + |  | + |  | - | + |  |
 | OTEL_EXPORTER_OTLP_METRICS_TEMPORALITY_PREFERENCE | + | + | + | + | + |  | + |  | - | + |  |
 | OTEL_EXPORTER_OTLP_METRICS_DEFAULT_HISTOGRAM_AGGREGATION |  | + |  | + | + |  |  |  | - |  |  |
-| OTEL_EXPERIMENTAL_CONFIG_FILE |  |  |  |  |  |  |  |  | - |  |  |
+| OTEL_EXPERIMENTAL_CONFIG_FILE |  |  |  |  |  |  | + |  | - |  |  |
 
 ## Declarative configuration
 
@@ -292,19 +292,19 @@ Disclaimer: Declarative configuration is currently in Development status - work
 
 | Feature | Go | Java | JS | Python | Ruby | Erlang | PHP | Rust | C++ | .NET | Swift |
 | ------- | -- | ---- | -- | ------ | ---- | ------ | --- | ---- | --- | ---- | ----- |
-| `Parse` a configuration file |  | x |  |  |  |  |  |  |  |  |  |
-| The `Parse` operation accepts the configuration YAML file format |  | x |  |  |  |  |  |  |  |  |  |
-| The `Parse` operation performs environment variable substitution |  | x |  |  |  |  |  |  |  |  |  |
-| The `Parse` operation returns configuration model |  | x |  |  |  |  |  |  |  |  |  |
-| The `Parse` operation resolves extension component configuration to `properties` |  | x |  |  |  |  |  |  |  |  |  |
-| `Create` SDK components |  | x |  |  |  |  |  |  |  |  |  |
-| The `Create` operation accepts configuration model |  | x |  |  |  |  |  |  |  |  |  |
-| The `Create` operation returns `TracerProvider` |  | x |  |  |  |  |  |  |  |  |  |
-| The `Create` operation returns `MeterProvider` |  | x |  |  |  |  |  |  |  |  |  |
-| The `Create` operation returns `LoggerProvider` |  | x |  |  |  |  |  |  |  |  |  |
-| The `Create` operation returns `Propagators` |  | x |  |  |  |  |  |  |  |  |  |
-| The `Create` operation calls `CreatePlugin` of corresponding `ComponentProvider` when encountering extension components |  | x |  |  |  |  |  |  |  |  |  |
-| Register a `ComponentProvider` |  | x |  |  |  |  |  |  |  |  |  |
+| `Parse` a configuration file |  | x |  |  |  |  | + |  |  |  |  |
+| The `Parse` operation accepts the configuration YAML file format |  | x |  |  |  |  | + |  |  |  |  |
+| The `Parse` operation performs environment variable substitution |  | x |  |  |  |  | + |  |  |  |  |
+| The `Parse` operation returns configuration model |  | x |  |  |  |  | + |  |  |  |  |
+| The `Parse` operation resolves extension component configuration to `properties` |  | x |  |  |  |  | + |  |  |  |  |
+| `Create` SDK components |  | x |  |  |  |  | + |  |  |  |  |
+| The `Create` operation accepts configuration model |  | x |  |  |  |  | + |  |  |  |  |
+| The `Create` operation returns `TracerProvider` |  | x |  |  |  |  | + |  |  |  |  |
+| The `Create` operation returns `MeterProvider` |  | x |  |  |  |  | + |  |  |  |  |
+| The `Create` operation returns `LoggerProvider` |  | x |  |  |  |  | + |  |  |  |  |
+| The `Create` operation returns `Propagators` |  | x |  |  |  |  | + |  |  |  |  |
+| The `Create` operation calls `CreatePlugin` of corresponding `ComponentProvider` when encountering extension components |  | x |  |  |  |  | + |  |  |  |  |
+| Register a `ComponentProvider` |  | x |  |  |  |  | + |  |  |  |  |
 
 ## Exporters
 
@@ -319,9 +319,9 @@ Disclaimer: Declarative configuration is currently in Development status - work
 | OTLP/HTTP binary Protobuf Exporter | * | + | + | + | + | + | + | + | + | + | + | - |
 | OTLP/HTTP JSON Protobuf Exporter |  | + | - | + | [-][py1003] |  | - | + |  | + | - | - |
 | OTLP/HTTP gzip Content-Encoding support | X | + | + | + | + | + | - | + |  | - | - | - |
-| Concurrent sending |  | - | + | + | [-][py1108] |  | - |  | + | - | - | - |
-| Honors retryable responses with backoff | X | + | - | + | + | + | - |  |  | - | - | - |
-| Honors non-retryable responses | X | + | - | - | + | + | - |  |  | - | - | - |
+| Concurrent sending |  | - | + | + | [-][py1108] |  | - | - | + | - | - | - |
+| Honors retryable responses with backoff | X | + | - | + | + | + | - | + |  | - | - | - |
+| Honors non-retryable responses | X | + | - | - | + | + | - | + |  | - | - | - |
 | Honors throttling response | X | + | - | - | + | + | - |  |  | - | - | - |
 | Multi-destination spec compliance | X | + | - |  | [-][py1109] |  | - |  |  | - | - | - |
 | SchemaURL in ResourceSpans and ScopeSpans |  | + | + |  | + |  | + | + |  |  | - |  |
@@ -330,7 +330,7 @@ Disclaimer: Declarative configuration is currently in Development status - work
 | Honors the [user agent spec](specification/protocol/exporter.md#user-agent) |  |  |  |  |  |  |  | + |  |  | + |  |
 | [Partial Success](https://github.com/open-telemetry/opentelemetry-proto/blob/main/docs/specification.md#partial-success) messages are handled and logged for OTLP/gRPC | X | + |  |  |  |  |  | + |  |  |  |  |
 | [Partial Success](https://github.com/open-telemetry/opentelemetry-proto/blob/main/docs/specification.md#partial-success-1) messages are handled and logged for OTLP/HTTP | X | + |  |  |  |  |  | + |  |  |  |  |
-| Metric Exporter configurable temporality preference |  |  | + |  | + |  |  |  |  |  |  |  |
+| Metric Exporter configurable temporality preference |  |  | + |  | + |  |  | + |  |  |  |  |
 | Metric Exporter configurable default aggregation |  |  | + |  | + |  |  |  |  |  |  |  |
 | **[Zipkin](specification/trace/sdk_exporters/zipkin.md)** | Optional | Go | Java | JS | Python | Ruby | Erlang | PHP | Rust | C++ | .NET | Swift |
 | Zipkin V1 JSON | X | - | + |  | + | - | - | - | - | - | - | - |

spec-compliance-matrix/php.yaml

@@ -114,7 +114,7 @@ sections:
           - name: Links can be recorded on span creation
             status: '+'
           - name: Links can be recorded after span creation
-            status: '?'
+            status: '+'
           - name: Links order is preserved
             status: '+'
       - heading: '[Span events](specification/trace/api.md#add-events)'
@@ -138,7 +138,7 @@ sections:
           - name: ShouldSample gets full parent Context
             status: '+'
           - name: 'Sampler: JaegerRemoteSampler'
-            status: '?'
+            status: '-'
           - name: '[New Span ID created also for non-recording Spans](specification/trace/sdk.md#sdk-span-creation)'
             status: '+'
           - name: '[IdGenerators](specification/trace/sdk.md#id-generators)'
@@ -190,7 +190,7 @@ sections:
       - name: '`AsynchronousGauge` instrument is supported.'
         status: '+'
       - name: '`Gauge` instrument is supported.'
-        status: '-'
+        status: '+'
       - name: '`UpDownCounter` instrument is supported.'
         status: '+'
       - name: '`AsynchronousUpDownCounter` instrument is supported.'
@@ -362,7 +362,7 @@ sections:
       - name: LogRecord.Set EventName
         status: '?'
       - name: Logger.Enabled
-        status: '?'
+        status: '+'
       - name: SimpleLogRecordProcessor
         status: '+'
       - name: BatchLogRecordProcessor
@@ -452,7 +452,7 @@ sections:
       - name: OTEL_BSP_*
         status: '+'
       - name: OTEL_BLRP_*
-        status: '?'
+        status: '+'
       - name: OTEL_EXPORTER_OTLP_*
         status: '+'
       - name: OTEL_EXPORTER_ZIPKIN_*
@@ -498,35 +498,35 @@ sections:
       - name: OTEL_EXPORTER_OTLP_METRICS_DEFAULT_HISTOGRAM_AGGREGATION
         status: '?'
       - name: OTEL_EXPERIMENTAL_CONFIG_FILE
-        status: '?'
+        status: '+'
   - name: Declarative configuration
     features:
       - name: '`Parse` a configuration file'
-        status: '?'
+        status: '+'
       - name: The `Parse` operation accepts the configuration YAML file format
-        status: '?'
+        status: '+'
       - name: The `Parse` operation performs environment variable substitution
-        status: '?'
+        status: '+'
       - name: The `Parse` operation returns configuration model
-        status: '?'
+        status: '+'
       - name: The `Parse` operation resolves extension component configuration to `properties`
-        status: '?'
+        status: '+'
       - name: '`Create` SDK components'
-        status: '?'
+        status: '+'
       - name: The `Create` operation accepts configuration model
-        status: '?'
+        status: '+'
       - name: The `Create` operation returns `TracerProvider`
-        status: '?'
+        status: '+'
       - name: The `Create` operation returns `MeterProvider`
-        status: '?'
+        status: '+'
       - name: The `Create` operation returns `LoggerProvider`
-        status: '?'
+        status: '+'
       - name: The `Create` operation returns `Propagators`
-        status: '?'
+        status: '+'
       - name: The `Create` operation calls `CreatePlugin` of corresponding `ComponentProvider` when encountering extension components
-        status: '?'
+        status: '+'
       - name: Register a `ComponentProvider`
-        status: '?'
+        status: '+'
   - name: Exporters
     features:
       - name: '[Exporter interface](specification/trace/sdk.md#span-exporter)'
@@ -548,11 +548,11 @@ sections:
           - name: OTLP/HTTP gzip Content-Encoding support
             status: '+'
           - name: Concurrent sending
-            status: '?'
+            status: '-'
           - name: Honors retryable responses with backoff
-            status: '?'
+            status: '+'
           - name: Honors non-retryable responses
-            status: '?'
+            status: '+'
           - name: Honors throttling response
             status: '?'
           - name: Multi-destination spec compliance
@@ -574,7 +574,7 @@ sections:
               messages are handled and logged for OTLP/HTTP'
             status: '+'
           - name: Metric Exporter configurable temporality preference
-            status: '?'
+            status: '+'
           - name: Metric Exporter configurable default aggregation
             status: '?'
       - heading: '**[Zipkin](specification/trace/sdk_exporters/zipkin.md)**'