PHP Date Function

<?php
$tomorrow = mktime(0, 0, 0, date("m"), date("d")+1, date("y"));
echo "Tomorrow is ".date("m/d/y", $tomorrow); 
?>

Important Full Date and Time:

• r: Displays the full date, time and timezone offset. It is equivalent to manually entering date("D, d M Y H:i:s O")

Time:

• a: am or pm depending on the time
• A: AM or PM depending on the time
• g: Hour without leading zeroes. Values are 1 through 12.
• G: Hour in 24-hour format without leading zeroes. Values are 0 through 23.
• h: Hour with leading zeroes. Values 01 through 12.
• H: Hour in 24-hour format with leading zeroes. Values 00 through 23.
• i: Minute with leading zeroes. Values 00 through 59.
• s: Seconds with leading zeroes. Values 00 through 59.

Day:

• d: Day of the month with leading zeroes. Values are 01 through 31.
• j: Day of the month without leading zeroes. Values 1 through 31
• D: Day of the week abbreviations. Sun through Sat
• l: Day of the week. Values Sunday through Saturday
• w: Day of the week without leading zeroes. Values 0 through 6.
• z: Day of the year without leading zeroes. Values 0 through 365.

Month:

• m: Month number with leading zeroes. Values 01 through 12
• n: Month number without leading zeroes. Values 1 through 12
• M: Abbreviation for the month. Values Jan through Dec
• F: Normal month representation. Values January through December.
• t: The number of days in the month. Values 28 through 31.

Year:

• L: 1 if it's a leap year and 0 if it isn't.
• Y: A four digit year format
• y: A two digit year format. Values 00 through 99.

Other Formatting:

• U: The number of seconds since the Unix Epoch (January 1, 1970)
• O: This represents the Timezone offset, which is the difference from Greenwich Meridian Time (GMT). 100 = 1 hour, -600 = -6 hours

Starting a PHP Session

<?php
session_start(); 
$_SESSION['views'] = 1; // store session data
echo "Pageviews = ". $_SESSION['views']; //retrieve data
?>

<?php
session_start(); 
session_destroy();
?>

PHP Cookies - Background

<?php
if(isset($_COOKIE['lastVisit']))
	$visit = $_COOKIE['lastVisit']; 
else
	echo "You've got some stale cookies!";

echo "Your last visit was - ". $visit;
?>

Your last visit was - 11:48 - 02/28/08 

PHP - String Position - strpos

$numberedString = "1234567890"; // 10 numbers from 1 to 0

$fivePos = strpos($numberedString, "5");
echo "The position of 5 in our string was $fivePos";

PHP str_replace Function

//string that needs to be customized
$rawstring = "Welcome Birmingham parents. Your replaceme is a pleasure to have!";

//male string
$malestr = str_replace("replaceme", "son", $rawstring);

//female string
$femalestr = str_replace("replaceme", "daughter", $rawstring);

echo "Son: ". $malestr . "<br />";
echo "Daughter: ". $femalestr;

PHP substr_replace Function

//string that needs to be customized
$original = "ABC123 Hello Mr. Cow! DEF321";

//starting point 5
$sp5 = substr_replace($original, "Five", 5);
//starting point 12
$sp12 = substr_replace($original, "Twelve", 12);
//starting point 0
$sp0 = substr_replace($original, "Zero", 0);
//starting point -1
$spneg1 = substr_replace($original, "Negative 1", -1);

//Echo each string
echo "Original String: $original <br />";
echo "Starting Point 5: $sp5 <br />";
echo "Starting Point 12: $sp12 <br />";
echo "Starting Point 0: $sp0 <br />";
echo "Starting Point -1: $spneg1 ";

PHP - String Capitalization Functions

$originalString = "String Capitalization 1234"; 

$upperCase = strtoupper($originalString);
echo "Old string - $originalString <br />";
echo "New String - $upperCase";

PHP - String Explode

$rawPhoneNumber = "800-555-5555"; 

$phoneChunks = explode("-", $rawPhoneNumber);
echo "Raw Phone Number = $rawPhoneNumber <br />";
echo "First chunk = $phoneChunks[0]<br />";
echo "Second chunk = $phoneChunks[1]<br />";
echo "Third Chunk chunk = $phoneChunks[2]";

PHP - Array implode

$pieces = array("Hello", "World,", "I", "am", "Here!");

$gluedTogetherSpaces = implode(" ", $pieces);
$gluedTogetherDashes = implode("-", $pieces);
for($i = 0; $i < count($pieces); $i++){
	echo "Piece #$i = $pieces[$i] <br />";
}
echo "Glued with Spaces = $gluedTogetherSpaces <br />";
echo "Glued with Dashes = $gluedTogetherDashes";

Piece #0 = Hello
Piece #1 = World,
Piece #2 = I
Piece #3 = am
Piece #4 = Here!
Glued with Spaces = Hello World, I am Here!
Glued with Dashes = Hello-World,-I-am-Here! 

PHP - File Create

$ourFileName = "testFile.txt";
$ourFileHandle = fopen($ourFileName, 'w') or die("can't open file");
fclose($ourFileHandle);

PHP - File Open

$ourFileName = "testFile.txt";
$fh = fopen($ourFileName, 'X') or die("Can't open file");
fclose($fh);

PHP - File Close

$ourFileName = "testFile.txt";
$ourFileHandle = fopen($ourFileName, 'w') or die("can't open file");
fclose($ourFileHandle);

PHP - File Write

$myFile = "testFile.txt";
$fh = fopen($myFile, 'w') or die("can't open file");
$stringData = "Bobby Bopper\n";
fwrite($fh, $stringData);
$stringData = "Tracy Tanner\n";
fwrite($fh, $stringData);
fclose($fh);

PHP - File Read

$myFile = "testFile.txt";
$fh = fopen($myFile, 'r');

PHP - File Delete

$myFile = "testFile.txt";
unlink($myFile);

PHP - File Append

$myFile = "testFile.txt";
$fh = fopen($myFile, 'a') or die("can't open file");
$stringData = "New Stuff 1\n";
fwrite($fh, $stringData);
$stringData = "New Stuff 2\n";
fwrite($fh, $stringData);
fclose($fh);

PHP - File Truncate

$myFile = "testFile.txt";
$fh = fopen($myFile, 'w');
fclose($fh);

PHP - File Upload

<form enctype="multipart/form-data" action="uploader.php" method="POST">
<input type="hidden" name="MAX_FILE_SIZE" value="100000" />
Choose a file to upload: <input name="uploadedfile" type="file" /><br />
<input type="submit" value="Upload File" />
</form>

// Where the file is going to be placed $target_path = "uploads/"; /* Add the original filename to our target path. Result is "uploads/filename.extension" */ $target_path = $target_path . basename( $_FILES['uploadedfile']['name']);
$target_path = "uploads/";

$target_path = $target_path . basename( $_FILES['uploadedfile']['name']); 

if(move_uploaded_file($_FILES['uploadedfile']['tmp_name'], $target_path)) {
    echo "The file ".  basename( $_FILES['uploadedfile']['name']). 
    " has been uploaded";
} else{
    echo "There was an error uploading the file, please try again!";
}