Php ไปเมื่อ 4 ใช้เส้นสาย

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php ไปก่อน 5 ตัวอักษรของข้อความ

$result = substr("Hello How are you", 0, 5); //first 5 chars "Hello"
3
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เอาเมื่อสี่แบ่ง php

$newstring = substr($dynamicstring, -7);

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