PHP Learning Notes: Reading the contents of a document, using PHP to modify the contents of the document

Directly on the code

<?PHP/** * Created by Phpstorm. * User:administrator * DATE:2016/9/10 0010 * time:20:27*/Header("content-type:text/html; CHARSET=GBK ");if(isset($_post[' subbtn '])) {//if committed, start the operation//execute the modification:    $fileContent=$_post[' Filecontent '];//get the contents of the input box    file_put_contents("A.txt",$fileContent);//Perform a replacement    Echo' Modify content successfully! ‘;}Else    Echo' Failed to modify content! ‘;><form method= "POST" action= "" > <textarea name= "filecontent" cols= "rows=" 8 "> <?phpEcho file_get_contents("A.txt")?> </textarea> <button name= "subbtn" > Modify content </button></form>

modifying test effects

Before modification:

After modification:

PHP Learning Notes: Reading the contents of a document, using PHP to modify the contents of the document