32 lines
881 B
PHP
32 lines
881 B
PHP
<?php
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declare(strict_types=1);
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namespace OpenTelemetry\API\Trace\Propagation;
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use function strlen;
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class TraceContextValidator
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{
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public const TRACE_FLAG_LENGTH = 2;
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public const TRACE_VERSION_REGEX = '/^(?!ff)[\da-f]{2}$/';
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/**
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* @param string $traceVersion
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* @return bool Returns a value that indicates whether a trace version is valid.
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*/
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public static function isValidTraceVersion(string $traceVersion): bool
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{
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return 1 === preg_match(self::TRACE_VERSION_REGEX, $traceVersion);
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}
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/**
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* @return bool Returns a value that indicates whether trace flag is valid
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* TraceFlags must be exactly 1 bytes (1 char) representing a bit field
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*/
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public static function isValidTraceFlag(string $traceFlag): bool
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{
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return ctype_xdigit($traceFlag) && strlen($traceFlag) === self::TRACE_FLAG_LENGTH;
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}
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}
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