PHP 表單驗證

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1. 驗證文字框是否有內容且不可為空

<?php
if (! (filter_has_var(INPUT_POST, ‘flavor‘) &&    (strlen(filter_input(INPUT_POST, ‘flavor‘)) > 0))) {    print ‘You must enter your favorite ice cream flavor.‘;}

 

2. 驗證字串個數

<?phpif (! (filter_has_var(INPUT_POST, ‘color‘) &&    (strlen(filter_input(INPUT_POST, ‘color‘, FILTER_SANITIZE_STRING)) <= 5))) {    print ‘Color must be more than 5 characters.‘;}

 

3. 驗證是否是數組

<?phpif (! (filter_has_var(INPUT_POST, ‘choices‘) &&    filter_input(INPUT_POST, ‘choices‘, FILTER_DEFAULT, FILTER_REQUIRE_ARRAY))) {    print ‘You must select some choices.‘;}

 

4. 驗證是否是整數

<?phpif (! (filter_has_var(INPUT_POST, ‘age‘) &&    filter_input(INPUT_POST, ‘age‘, FILTER_VALIDATE_INT))) {    print "Submitted age is invalid.";}

 

5. 驗證是否是浮點數

<?phpif (! (filter_has_var(INPUT_POST, ‘price‘) &&    filter_input(INPUT_POST, ‘price‘, FILTER_VALIDATE_FLOAT))) {    print "Submitted age is invalid.";}

 

PHP 表單驗證