PHP MySQL where clause

WHERE Clause

WHERE Clause is used to extract records that meet the specified criteria .

grammar

SELECT column_name(s)
FROM table_name
WHERE column_name operator value

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In order to make PHP Execute the above statement , We have to use mysqli_query() function . This function is used to send a message to MySQL Connect to send queries or commands .

example

The following example will start from "Persons" Select all in the table FirstName='Peter' The line of ：

<?php
$con=mysqli_connect("localhost","username","password","database");
//  Detection connection 
if (mysqli_connect_errno())
{
    echo " The connection fails : " . 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 above code will be output ：

Peter Griffin