026-PHP常用字符串函数(三)

<?php
    //颠倒字串
    print("abcdefg  颠倒  ");
    print(strrev("abcdefg")."<hr>");

    //小写字串
    print("小写: ".strtolower("Hello World")."<hr>");

    //大写字串
    print("大写: ".strtoupper("Hello World")."<hr>");

    //去空格
    $text = "     whitespace      ";
    print("\"" . trim($text) . "\"");
?>

标签：trim,text,print,026,字符串,World,PHP,Hello,写字
来源： https://www.cnblogs.com/tianpan2019/p/10987994.html