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<?php var_dump(mb_substr("香港亿阳实业钻井工程施工服务应付账款转让项目(二期)", 0, 8, 'utf-8') . '****' . mb_substr("香港亿阳实业钻井工程施工服务应付账款转让项目(二期)", -8, 'utf-8'));
Output for git.master, git.master_jit, rfc.property-hooks
Fatal error: Uncaught TypeError: mb_substr(): Argument #3 ($length) must be of type ?int, string given in /in/hCM7h:3 Stack trace: #0 /in/hCM7h(3): mb_substr('\xE9\xA6\x99\xE6\xB8\xAF\xE4\xBA\xBF\xE9\x98\xB3\xE5\xAE\x9E...', -8, 'utf-8') #1 {main} thrown in /in/hCM7h on line 3
Process exited with code 255.

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