Why environment variables don’t suppress WP-CLI PHP Deprecated warnings — the phar + shebang path and a three-part structural fix

Short summary

When WP-CLI runs as a shebang-launched phar binary, the WP_CLI_PHP_ARGS environment variable never reaches PHP's startup, so deprecated warnings persist. The fix detects whether the path invokes PHP directly and injects -d error_reporting immediately after the binary. A secondary helper extracts only the JSON portion from stdout to handle remaining noise.

• •Shebang-launched phar bypasses WP_CLI_PHP_ARGS, so env vars don't suppress PHP warnings
• •Fix: detect php-direct invocation and inject -d error_reporting after the binary
• •JSON extraction helper isolates valid JSON from noisy stdout, reducing parse failures

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