如何使用SUBSTR功能搜索

Question

我需要使用SUBSTR讓誰寫的信件，或者如果我寫名字

if(isset($_GET['search'])){ 
$sql="SELECT * FROM students WHERE first_name='".$_POST['sname']."' OR   last_name='".$_POST['fname']."'"; 
$record=mysql_query($sql);} 

<?php 
echo"<form action='admin.php?page=3&search' method='Post'>"; 
echo"<input type='text' name='sname' value='ex: Student Name'> &nbsp; &nbsp;"; 
echo"<input type='text' name='fname' value='ex: Family Name'> &nbsp; &nbsp;"; 
echo"<button type='submit' name='search' class='btn' >Search</button>"; 
echo"</form>"; 
?> 

Answer 1

我認爲你需要更改查詢的一部分，使用LIKE名稱在查詢中：

$sql="SELECT * FROM students WHERE first_name like '%".$_POST['sname']."%' OR last_name like '%".$_POST['fname']."%' "; 

Answer 2

使用LIKE %。

if(isset($_GET['search'])) 
{ 
$sql="SELECT * FROM students WHERE first_name LIKE '%".$_POST['sname']."%' OR last_name LIKE '%".$_POST['fname']."%'"; 
$record=mysql_query($sql); 
}