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🇰🇷 PHP Documentation — 한국어

Official PHP manual in Korean (한국어).

This page links to the official PHP documentation in Korean. The PHP manual is maintained by the PHP documentation team and is available in multiple languages courtesy of community translators.

View PHP Manual (한국어) →
Common PHP Sections
Language Reference Function Reference Installation Security Features Appendices
Quick Reference

String Functions

PHP 
// String length
strlen("Hello World");      // 11

// Find in string
strpos("Hello World", "o"); // 4

// Replace in string
str_replace("World", "PHP", "Hello World"); // "Hello PHP"

// Convert case
strtolower("HELLO");   // "hello"
strtoupper("hello");   // "HELLO"

// Trim whitespace
trim("  hello  ");     // "hello"