Answer
Native PHP functions treat strings as bytes. mbstring ensures correct handling of UTF-8 multibyte characters to avoid corrupted text.
Quick Answer
Multi-byte strings (like UTF-8) use multiple bytes per character. Standard string functions (strlen, substr) count bytes not characters. mbstring functions (mb_strlen, mb_substr, mb_strtolower) are character-aware. Set mbstring.internal_encoding to UTF-8. Always use mb_ functions when handling international text, emojis, or any non-ASCII content to avoid cutting characters mid-byte.
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SugharaIQ Editorial Team
Verified Answer
This answer has been peer-reviewed by industry experts holding senior engineering roles to ensure technical accuracy and relevance for modern interview standards.
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Source: SugharaIQ