PHP WHERE

PHP MySQL The Where Clause

 

The WHERE clause is used to filter records.

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The WHERE clause

The WHERE clause is used to extract only those records that fulfill a specified criterion.

Syntax

SELECT column_name(s)
FROM table_name
WHERE column_name operator value

To get PHP to execute the statement above we must use the mysqli_query() function. This function is used to send a query or command to a MySQL connection.

Example

The following example selects all rows from the “Persons” table where “FirstName=’Peter'”:

<?php
$con=mysqli_connect(“example.com”,”peter”,”abc123″,”my_db”);
// Check connection
if (mysqli_connect_errno())
  {
  echo “Failed to connect to MySQL: ” . mysqli_connect_error();
  }

$result = mysqli_query($con,”SELECT * FROM Persons
WHERE FirstName=’Peter'”);

while($row = mysqli_fetch_array($result))
  {
  echo $row[‘FirstName’] . ” ” . $row[‘LastName’];
  echo “<br>”;
  }
?>

The output of the code above will be:

Peter Griffin