How to check the valid of the PostgreSQL datetime format string taken from user?
I'm using PostgreSQL 9.6 and PHP 7.x.
I want to check the validity of the PostgreSQL date time format received from the user.
I looked at this document.
I tried that
<?php
$format = 'YYYY-MM-DD';
$query = $db->prepare("SELECT TO_CHAR(NOW(), '" . $format . "') AS DATETIME");
if($query->execute()) {
echo 'valid';
else
echo 'invalid';
//Result valid;
<?php
$format = 'abcdefg';
$query = $db->prepare("SELECT TO_CHAR(NOW(), '" . $format . "') AS DATETIME");
if($query->execute()) {
echo 'valid';
else
echo 'invalid';
//Result valid
It didn't work as I wanted.
Because query works regardless if the format is valid or not.
Example
//sql
SELECT TO_CHAR(NOW(), 'YYYY-MM-DD') AS DATETIME;
//query executed
//Result
2018-11-16
//sql
SELECT TO_CHAR(NOW(), 'abcdefg') AS DATETIME;
//query executed
//Result
aad6efg
My question is how to check this.
php sql postgresql postgresql-9.6
edited Nov 16 '18 at 12:48
Laurenz Albe
51.8k103052
asked Nov 16 '18 at 9:33
MelihMelih
186
add a comment |
I'm using PostgreSQL 9.6 and PHP 7.x.
I want to check the validity of the PostgreSQL date time format received from the user.
I looked at this document.
I tried that
<?php
$format = 'YYYY-MM-DD';
$query = $db->prepare("SELECT TO_CHAR(NOW(), '" . $format . "') AS DATETIME");
if($query->execute()) {
echo 'valid';
else
echo 'invalid';
//Result valid;
<?php
$format = 'abcdefg';
$query = $db->prepare("SELECT TO_CHAR(NOW(), '" . $format . "') AS DATETIME");
if($query->execute()) {
echo 'valid';
else
echo 'invalid';
//Result valid
It didn't work as I wanted.
Because query works regardless if the format is valid or not.
Example
//sql
SELECT TO_CHAR(NOW(), 'YYYY-MM-DD') AS DATETIME;
//query executed
//Result
2018-11-16
//sql
SELECT TO_CHAR(NOW(), 'abcdefg') AS DATETIME;
//query executed
//Result
aad6efg
My question is how to check this.
php sql postgresql postgresql-9.6
edited Nov 16 '18 at 12:48
Laurenz Albe
51.8k103052
asked Nov 16 '18 at 9:33
MelihMelih
186
add a comment |
I'm using PostgreSQL 9.6 and PHP 7.x.
I want to check the validity of the PostgreSQL date time format received from the user.
I looked at this document.
I tried that
<?php
$format = 'YYYY-MM-DD';
$query = $db->prepare("SELECT TO_CHAR(NOW(), '" . $format . "') AS DATETIME");
if($query->execute()) {
echo 'valid';
else
echo 'invalid';
//Result valid;
<?php
$format = 'abcdefg';
$query = $db->prepare("SELECT TO_CHAR(NOW(), '" . $format . "') AS DATETIME");
if($query->execute()) {
echo 'valid';
else
echo 'invalid';
//Result valid
It didn't work as I wanted.
Because query works regardless if the format is valid or not.
Example
//sql
SELECT TO_CHAR(NOW(), 'YYYY-MM-DD') AS DATETIME;
//query executed
//Result
2018-11-16
//sql
SELECT TO_CHAR(NOW(), 'abcdefg') AS DATETIME;
//query executed
//Result
aad6efg
My question is how to check this.
php sql postgresql postgresql-9.6
edited Nov 16 '18 at 12:48
Laurenz Albe
51.8k103052
asked Nov 16 '18 at 9:33
MelihMelih
186
I'm using PostgreSQL 9.6 and PHP 7.x.
I want to check the validity of the PostgreSQL date time format received from the user.
I looked at this document.
I tried that
<?php
$format = 'YYYY-MM-DD';
$query = $db->prepare("SELECT TO_CHAR(NOW(), '" . $format . "') AS DATETIME");
if($query->execute()) {
echo 'valid';
else
echo 'invalid';
//Result valid;
<?php
$format = 'abcdefg';
$query = $db->prepare("SELECT TO_CHAR(NOW(), '" . $format . "') AS DATETIME");
if($query->execute()) {
echo 'valid';
else
echo 'invalid';
//Result valid
It didn't work as I wanted.
Because query works regardless if the format is valid or not.
Example
//sql
SELECT TO_CHAR(NOW(), 'YYYY-MM-DD') AS DATETIME;
//query executed
//Result
2018-11-16
//sql
SELECT TO_CHAR(NOW(), 'abcdefg') AS DATETIME;
//query executed
//Result
aad6efg
My question is how to check this.
php sql postgresql postgresql-9.6
php sql postgresql postgresql-9.6
edited Nov 16 '18 at 12:48
Laurenz Albe
51.8k103052
asked Nov 16 '18 at 9:33
MelihMelih
186
edited Nov 16 '18 at 12:48
Laurenz Albe
51.8k103052
asked Nov 16 '18 at 9:33
MelihMelih
186
edited Nov 16 '18 at 12:48
Laurenz Albe
51.8k103052
edited Nov 16 '18 at 12:48
Laurenz Albe
51.8k103052
edited Nov 16 '18 at 12:48
Laurenz Albe
51.8k103052
51.8k103052
asked Nov 16 '18 at 9:33
MelihMelih
186
asked Nov 16 '18 at 9:33
MelihMelih
186
asked Nov 16 '18 at 9:33
MelihMelih
186
186
add a comment |
add a comment |
1 Answer
1
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That is because it is a valid format.
You should probably define what you consider a valid format and perhaps compose a regular expression for that.
By the way, your code is vulnerable to SQL injection, which is particularly dangerous since you are trying to verify unreliable data here.
answered Nov 16 '18 at 12:46
Laurenz AlbeLaurenz Albe
51.8k103052
I think you are right. I'm going to look at ways to use regular expression. By the way, this isn't my main code. I've written to test my way to mind.
– Melih
Nov 16 '18 at 14:36
add a comment |
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1 Answer
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1 Answer
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active
oldest
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oldest
votes
That is because it is a valid format.
You should probably define what you consider a valid format and perhaps compose a regular expression for that.
By the way, your code is vulnerable to SQL injection, which is particularly dangerous since you are trying to verify unreliable data here.
answered Nov 16 '18 at 12:46
Laurenz AlbeLaurenz Albe
51.8k103052
I think you are right. I'm going to look at ways to use regular expression. By the way, this isn't my main code. I've written to test my way to mind.
– Melih
Nov 16 '18 at 14:36
add a comment |
That is because it is a valid format.
You should probably define what you consider a valid format and perhaps compose a regular expression for that.
By the way, your code is vulnerable to SQL injection, which is particularly dangerous since you are trying to verify unreliable data here.
answered Nov 16 '18 at 12:46
Laurenz AlbeLaurenz Albe
51.8k103052
I think you are right. I'm going to look at ways to use regular expression. By the way, this isn't my main code. I've written to test my way to mind.
– Melih
Nov 16 '18 at 14:36
add a comment |
That is because it is a valid format.
You should probably define what you consider a valid format and perhaps compose a regular expression for that.
By the way, your code is vulnerable to SQL injection, which is particularly dangerous since you are trying to verify unreliable data here.
answered Nov 16 '18 at 12:46
Laurenz AlbeLaurenz Albe
51.8k103052
That is because it is a valid format.
You should probably define what you consider a valid format and perhaps compose a regular expression for that.
By the way, your code is vulnerable to SQL injection, which is particularly dangerous since you are trying to verify unreliable data here.
answered Nov 16 '18 at 12:46
Laurenz AlbeLaurenz Albe
51.8k103052
answered Nov 16 '18 at 12:46
Laurenz AlbeLaurenz Albe
51.8k103052
answered Nov 16 '18 at 12:46
Laurenz AlbeLaurenz Albe
51.8k103052
answered Nov 16 '18 at 12:46
Laurenz AlbeLaurenz Albe
51.8k103052
51.8k103052
I think you are right. I'm going to look at ways to use regular expression. By the way, this isn't my main code. I've written to test my way to mind.
– Melih
Nov 16 '18 at 14:36
add a comment |
I think you are right. I'm going to look at ways to use regular expression. By the way, this isn't my main code. I've written to test my way to mind.
– Melih
Nov 16 '18 at 14:36
I think you are right. I'm going to look at ways to use regular expression. By the way, this isn't my main code. I've written to test my way to mind.
– Melih
Nov 16 '18 at 14:36
I think you are right. I'm going to look at ways to use regular expression. By the way, this isn't my main code. I've written to test my way to mind.
– Melih
Nov 16 '18 at 14:36
add a comment |
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