To add if-else embedding inside HTML with PHP, we use the short open tag syntax.
For instance, we write
<? if ($condition): ?>
<p>Content</p>
<? elseif ($other_condition): ?>
<p>Other Content</p>
<? else: ?>
<p>Default Content</p>
<? endif; ?>
to add if, elseif, else, and endif clauses in between our HTML code.
Sometimes, we want to solve "Fatal error: Class ‘MySQLi’ not found" with PHP.
In this article, we’ll look at how to solve "Fatal error: Class ‘MySQLi’ not found" with PHP.
To solve "Fatal error: Class ‘MySQLi’ not found" with PHP, we install MySQLi.
To install it, we run
sudo apt-get install php-mysqlnd
to install MySQLi by installing the php-mysqlnd package.
To solve "Fatal error: Class ‘MySQLi’ not found" with PHP, we install MySQLi.
Sometimes, we want to send file attachments from form ising phpMailer and PHP.
In this article, we’ll look at how to send file attachments from form ising phpMailer and PHP.
To send file attachments from form ising phpMailer and PHP, we call the AddAttachment method.
For instance, we write
if (
isset($_FILES["uploaded_file"]) &&
$_FILES["uploaded_file"]["error"] == UPLOAD_ERR_OK
) {
$mail->AddAttachment(
$_FILES["uploaded_file"]["tmp_name"],
$_FILES["uploaded_file"]["name"]
);
}
to call $mail->AddAttachment with the temporary name of the file and the real name of the file to add the file at the location as an attachment.
$_FILES["uploaded_file"] has the uploaded file.
To send file attachments from form ising phpMailer and PHP, we call the AddAttachment method.
Sometimes, we want to preserve line breaks from a text area with PHP.
In this article, we’ll look at how to preserve line breaks from a text area with PHP.
To preserve line breaks from a text area with PHP, we can use the nl2br function.
For instance, we write
echo nl2br("This\r\nis\n\ra\nstring\r");
to return a string with '\r\n' and '\r' replaced with '<br />'.
To preserve line breaks from a text area with PHP, we can use the nl2br function.
Sometimes, we want to get the name of the caller function in PHP.
In this article, we’ll look at how to get the name of the caller function in PHP.
To get the name of the caller function in PHP, we can use the debug_backtrace function.
For instance, we write
$trace = debug_backtrace();
$caller = $trace[1];
echo "Called by {$caller["function"]}";
if (isset($caller["class"])) {
echo " in {$caller["class"]}";
}
to call debug_backtrace and get the 2nd entry to get the $caller array.
We then use $caller["function"] to get the caller function name and the $caller["class"] get the caller class name.
To get the name of the caller function in PHP, we can use the debug_backtrace function.
Sometimes, we want to pass $_POST values with cURL and PHP.
In this article, we’ll look at how to pass $_POST values with cURL and PHP.
To pass $_POST values with cURL and PHP, we set a few options.
For instance, we write
$data = ["name" => "Ross", "php_master" => true];
$data["file"] = "@/home/user/world.jpg";
$handle = curl_init($url);
curl_setopt($handle, CURLOPT_POST, true);
curl_setopt($handle, CURLOPT_POSTFIELDS, $data);
curl_exec($handle);
curl_close($handle);
to call curl_setopt to set CURLOPT_POST to true to make a POST request.
We call curl_setopt again to set CURLOPT_POSTFIELDS to $data to use $data as the POST request body.
Then we call curl_exec to make the request.
Finally, we call curl_close to close the handle.
To pass $_POST values with cURL and PHP, we set a few options.
Sometimes, we want to stream a large file using PHP.
In this article, we’ll look at how to stream a large file using PHP.
To stream a large file using PHP, we can use the fpassthru function.
For instance, we write
$path = "path/to/file";
$public_name = basename($path);
$finfo = finfo_open(FILEINFO_MIME_TYPE);
$mime_type = finfo_file($finfo, $path);
header("Content-Disposition: attachment; filename=$public_name;");
header("Content-Type: $mime_type");
header("Content-Length: " . filesize($path));
$fp = fopen($path, "rb");
fpassthru($fp);
exit();
to call header to set the header values for the file.
We set Content-Type to $mime_type.
And we Content-Length to the file size that we get from $filesize.
$public_name is the public file name, which we use as the value of filename.
Then we open the file from the $path with fopen.
Next we call fpassthru with $fp to stream the file.
Once we’re done streaming, we call exit.
To stream a large file using PHP, we can use the fpassthru function.
Sometimes, we want to loop through this array in PHP.
In this article, we’ll look at how to loop through this array in PHP.
To loop through this array in PHP, we can use a foreach loop.
For instance, we write
foreach ($array as $item) {
echo $item["filename"];
echo $item["filepath"];
echo "<pre>";
var_dump($item);
}
to loop through the $array and get the item being looped through from $item.
Then we get the values from the $item associative array in the loop body.
To loop through this array in PHP, we can use a foreach loop.
Sometimes, we want to get URL query string parameters with PHP.
In this article, we’ll look at how to get URL query string parameters with PHP.
To get URL query string parameters with PHP, we use the parse_url function.
For instance, we write
$url = "www.mysite.com/category/subcategory?myqueryhash";
echo parse_url($url, PHP_URL_QUERY);
to call parse_url with $url and PHP_URL_QUERY to return the query string part odf the $url as an associative array with the keys and values.
To get URL query string parameters with PHP, we use the parse_url function.
Sometimes, we want to insert a row and then get ‘id’ with PHP/MySQL.
In this article, we’ll look at how to insert a row and then get ‘id’ with PHP/MySQL.
To insert a row and then get ‘id’ with PHP/MySQL, we can use the mysqli_insert_id function.
For instance, we write
$link = mysqli_connect("127.0.0.1", "my_user", "my_pass", "my_db");
mysqli_query($link, "INSERT INTO mytable (1, 2, 3, 'blah')");
$id = mysqli_insert_id($link);
to connect to the database with mysqli_connect.
Then we call mysqli_query function to run the insert statement.
Finally, we get the ID of the last row inserted with mysqli_insert_id.
To insert a row and then get ‘id’ with PHP/MySQL, we can use the mysqli_insert_id function.
