<?php
move_uploaded_file($_FILES['fileupname']['tmp_name'],'upload/' . $_FILES['fileupname']['name']);
$files = scandir('upload');
for ($i=2;$i<count($files);$i++){
echo '同學作品：' . $i-1 . '<br>';
echo "<iframe src='upload/$files[$i]'></iframe>" . '<br>';
}
?>
key:
move_uploaded_file
$_FILES[]
tmp_name
upload/
scandir
count($files)
<iframe src='upload/$files[$i]'>
<?php
move_uploaded_file($_FILES['fname']['tmp_name'],'upload/' . $_FILES['fname']['name']);
$files = scandir('upload');
for($i=2;$i<count($files);$i++)
{
echo '同學上傳作品：' . $i-1 .'<br>';
echo "<iframe src='upload/$files[$i]' width=50% height=50%></iframe><br>";
}
?>
# -*- coding: utf-8 -*-
# p = 2*x^5 + 3*x^2 + 2*x^1 + 5
# q = 2*x^3 + 3*x^1 + 6
# p+q = ?
# p*q = ?
# ans: 2*x^5 + 2*x^3 + 3*x^2 + 5*x^1+ 11
p = '2*x^5 + 3*x^2 + 2*x^1 + 5'
q = '2*x^3 + 3*x^1 + 6'
print('p=' + p)
print('q=' + q)
pl = p.replace(' ','').split('+')
ql = q.replace(' ','').split('+')
r = {}
for p in pl:
p =[int(i) for i in p.split('*x^')]
if len(p)>1:
if p[1] in r:
r[p[1]] += int(p[0])
else:
r[p[1]] = int(p[0])
else:
if 0 in r:
r[0]+=p[0]
else:
r[0]=p[0]
for q in ql:
q =[int(i) for i in q.split('*x^')]
if len(q)>1:
if q[1] in r:
r[q[1]] += int(q[0])
else:
r[q[1]] = int(q[0])
else:
if 0 in r:
r[0]+=q[0]
else:
r[0]=q[0]
d =[ [k,v] for k,v in r.items()]
d.sort()
d.reverse()
sss = []
for i in d:
sss.append(str(i[1]) + '*x^' + str(i[0]))
sss = '+'.join(sss)
print('p+q = ' + sss[:-4])
# multiply p q
if len(pl[-1])==1:
pl[-1]=pl[-1]+'*x^0'
if len(ql[-1])==1:
ql[-1]=ql[-1]+'*x^0'
pl = [i.split('*x^') for i in pl]
ql = [i.split('*x^') for i in ql]
pl = [[int(j) for j in i] for i in pl]
ql = [[int(j) for j in i] for i in ql]
# print(pl)
# print(ql)
r1 = []
lp = len(pl)
lq = len(ql)
for i in range(lp):
for j in range(lq):
r1.append([pl[i][0]*ql[j][0],pl[i][1]+ql[j][1]])
# print(r1)
r = {}
for i in r1:
if i[1] in r:
r[i[1]]+=i[0]
else:
r[i[1]]=i[0]
# print(r)
d =[ [k,v] for k,v in r.items()]
d.sort()
d.reverse()
sss = []
for i in d:
sss.append(str(i[1]) + '*x^' + str(i[0]))
sss = '+'.join(sss)
print('p*q = ' + sss[:-4])
file upload 分享
建upload子目錄
fup.html 步驟
dw中插入
1. 表單
2. file 欄位, name設為 upfilename
3. submit 按鈕
fup.html 內容
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<form method="post" action="fup.php" enctype="multipart/form-data" >
<input name="my_file" type="file">
<input name="submit" type="submit" value="上傳">
</form>
fup.php 內容
move_uploaded_file($_FILES['upfilename'][tmp_name],'upload/' . $FILES['upfilename']['name']);
#完美數
# n = 28
for n in range(1,1001):
a = []
for i in range(1,n):
if n%i==0:
a.append(i)
if sum(a)==n:
print(n,':perfect number')
runfile('C:/Users/j945935/.spyder-py3/untitled1.py', wdir='C:/Users/j945935/.spyder-py3')
6 :perfect number
28 :perfect number
496 :perfect number
<?php
$conn2 = mysqli_connect('localhost','root','','test1');
$sqlstr = "select * from user where username = '" . $_POST['username'] . "'";
$result = mysqli_query($conn2,$sqlstr);
echo '<table width="400" border="1">';
while ($row = mysqli_fetch_assoc($result))
{
echo '<tr>';
echo '<td>';
echo $row['username'];
echo '</td>';
echo '<td>';
echo $row['password'];
echo '</td>';
echo '</tr>';
}
echo '</table>';
?>
$sqlstr = "select * from user where username = '" . $_POST['username'] . "'";
1 "select * from user where username = ' "
2 . $_POST['username'] .
3 " ' "
說明：
"select ...... ' " + $_POST['username']
+ " ' "
實際送出指令為
select * from user where username = ' $_POST['username']'
把字串拆成三段
1 select * from user where username = '
2 $_POST['username']
3 ’
最後 1、3 用雙引號包起來，再用句點把字串連起來。
