Gxlsystem TIY Editor
Gxlsystem 在线教程
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暗黑模式
<!DOCTYPE html> <html> <body> <?php echo substr("Hello world",0,10)."<br>"; echo substr("Hello world",1,8)."<br>"; echo substr("Hello world",0,5)."<br>"; echo substr("Hello world",6,6)."<br>"; echo substr("Hello world",0,-1)."<br>"; echo substr("Hello world",-10,-2)."<br>"; echo substr("Hello world",0,-6)."<br>"; echo substr("Hello world",-2-3)."<br>"; ?> </body> </html>