diff --git "a/\351\231\210\346\242\201\346\235\260/20220516-PHP\345\207\275\346\225\260.md" "b/\351\231\210\346\242\201\346\235\260/20220516-PHP\345\207\275\346\225\260.md"
new file mode 100644
index 0000000000000000000000000000000000000000..bdd364bc868f874f757210908b969f3b6c72e6ff
--- /dev/null
+++ "b/\351\231\210\346\242\201\346\235\260/20220516-PHP\345\207\275\346\225\260.md"
@@ -0,0 +1,35 @@
+```php+HTML
+";
+//2、至少对3个字符串函数进行应用
+$str=" i am a student ";
+echo trim($str)."
";
+echo ucwords($str)."
";
+echo strtoupper($str);
+
+echo "