The CompressGzipstream uses some functions that were only added on PHP 7:
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FOUND 6 ERRORS AFFECTING 3 LINES
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1476 | ERROR | The function deflate_init() is not present in PHP
| | version 5.6 or earlier
| | (PHPCompatibility.FunctionUse.NewFunctions.deflate_initFound)
1476 | ERROR | The constant "ZLIB_ENCODING_GZIP" is not present in
| | PHP version 5.6 or earlier
| | (PHPCompatibility.Constants.NewConstants.zlib_encoding_gzipFound)
1483 | ERROR | The function deflate_add() is not present in PHP
| | version 5.6 or earlier
| | (PHPCompatibility.FunctionUse.NewFunctions.deflate_addFound)
1483 | ERROR | The constant "ZLIB_NO_FLUSH" is not present in PHP
| | version 5.6 or earlier
| | (PHPCompatibility.Constants.NewConstants.zlib_no_flushFound)
1492 | ERROR | The function deflate_add() is not present in PHP
| | version 5.6 or earlier
| | (PHPCompatibility.FunctionUse.NewFunctions.deflate_addFound)
1492 | ERROR | The constant "ZLIB_FINISH" is not present in PHP
| | version 5.6 or earlier
| | (PHPCompatibility.Constants.NewConstants.zlib_finishFound)
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The
CompressGzipstream
uses some functions that were only added on PHP 7: