web audio recorder

https://github.com/cwilso/AudioRecorder

http://subinsb.com/html5-record-mic-voice

Record, Play, Download Microphone Sound With HTML5

http://subinsb.com/html5-record-mic-voice

$_SERVER array

<?php
foreach($_SERVER as $key=>$value){
echo  "$key : $value<br>";

}
?>


HTTP_HOST : 65.181.118.232
HTTP_CONNECTION : keep-alive
HTTP_CACHE_CONTROL : max-age=0
HTTP_UPGRADE_INSECURE_REQUESTS : 1
HTTP_USER_AGENT : Mozilla/5.0 (Windows NT 6.1) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/53.0.2785.143 Safari/537.36
HTTP_ACCEPT : text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,*/*;q=0.8
HTTP_ACCEPT_ENCODING : gzip, deflate, sdch
HTTP_ACCEPT_LANGUAGE : es-ES,es;q=0.8,en;q=0.6
PATH : /usr/local/bin:/usr/bin:/bin
SERVER_SIGNATURE :

Apache/2.4.6 (Ubuntu) Server at 65.181.118.232 Port 80

SERVER_SOFTWARE : Apache/2.4.6 (Ubuntu)
SERVER_NAME : 65.181.118.232
SERVER_ADDR : 65.181.118.232
SERVER_PORT : 80
REMOTE_ADDR : 148.103.149.6
DOCUMENT_ROOT : /var/www
REQUEST_SCHEME : http
CONTEXT_PREFIX :
CONTEXT_DOCUMENT_ROOT : /var/www
SERVER_ADMIN : webmaster@localhost
SCRIPT_FILENAME : /var/www/test.php
REMOTE_PORT : 50257
GATEWAY_INTERFACE : CGI/1.1
SERVER_PROTOCOL : HTTP/1.1
REQUEST_METHOD : GET
QUERY_STRING :
REQUEST_URI : /test.php
SCRIPT_NAME : /test.php
PHP_SELF : /test.php
REQUEST_TIME_FLOAT : 1477189544.259
REQUEST_TIME : 1477189544

forcing download

<?php
header('Content-Type: application/pdf');
readfile("/var/www/hosting/asterisk/books/vicidial/ViciBox_Redux-Install.pdf");
?>

Uploading multiple files

Example #1 

<?php
$uploads_dir = '/uploads';
foreach ($_FILES["pictures"]["error"] as $key => $error) {
    if ($error == UPLOAD_ERR_OK) {
        $tmp_name = $_FILES["pictures"]["tmp_name"][$key];
        // basename() may prevent filesystem traversal attacks;
        // further validation/sanitation of the filename may be appropriate
        $name = basename($_FILES["pictures"]["name"][$key]);
        move_uploaded_file($tmp_name, "$uploads_dir/$name");
    }
}?>http://php.net/manual/en/function.move-uploaded-file.php

Example with rename()

Example #1 Example with rename()

<?php
rename("/tmp/tmp_file.txt", "/home/user/login/docs/my_file.txt");?>http://php.net/manual/en/function.rename.php

Handy one liner to parse a CSV file into an array

<?php

$csv = array_map('str_getcsv', file('data.csv'));
?>

http://php.net/manual/en/function.str-getcsv.php

Read and print the entire contents of a CSV file

Example #1 Read and print the entire contents of a CSV file

<?php
$row = 1;
if (($handle = fopen("test.csv", "r")) !== FALSE) {
    while (($data = fgetcsv($handle, 1000, ",")) !== FALSE) {
        $num = count($data);
        echo "<p> $num fields in line $row: <br /></p>\n";
        $row++;
        for ($c=0; $c < $num; $c++) {
            echo $data[$c] . "<br />\n";
        }
    }
    fclose($handle);
}?>http://php.net/manual/en/function.fgetcsv.php

Reading a file line by line

Examples ¶

Example #1 Reading a file line by line

<?php
$handle = @fopen("/tmp/inputfile.txt", "r");
if ($handle) {
    while (($buffer = fgets($handle, 4096)) !== false) {
        echo $buffer;
    }
    if (!feof($handle)) {
        echo "Error: unexpected fgets() fail\n";
    }
    fclose($handle);
}?>http://php.net/manual/en/function.fgets.php

The special NULL value represents a variable with no value. NULL is the only possible value of type null.

A variable is considered to be null if:

• it has been assigned the constant NULL.
• it has not been set to any value yet.
• it has been unset().

If a variable is  equal to  0, "",'' is  equal to be null

<?php

$r="";

if(!$r)

{

echo " var is null ";

}

else {

echo " var has a value";

}

?>