PHP mysqli query to check if a row exist
33257
How to check if a row exists in MySQL? (i.e. check if an email exists in MySQL)
63372
see if a variable equals any other variables in a list php
49486
Problem with $_POST, if isset() and mysql_fetch_assoc(): echo returns correct value, page source always returns else value
76864
What is the best way to check if a URL exists in PHP?
104699
SQL command based on PHP strstr or LIKE
143002
Using PDO to echo display all rows from a table
119255
MySQL query not working while using php variable in where clause
156813
PDO mysql: How to know if insert was successful
146393
Check to see if an email is already in the database using prepared statements
63056
Subquery using Exists 1 or Exists *
106579
insert if not exist from arraylist
56731
How do I count query result rows?
114938
Check if email exist php
25077
Check if table exists in SQL Server
28974
Warning: mysqli_error() expects exactly 1 parameter, 0 given error
71972
MySQLi equivalent of mysql_result()?
30762
array_key_exists is not working