PHP

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  Terminology

array() Create an array.

date('H:i:s') definition: 'Current time in 00:00:00 format.'

date('Y/m/d') Current date in 0000/00/00 format.

debug_backtrace() Generates a backtrace into an array.

debug_print_backtrace() Prints a backtrace.

get_class_methods(<object>) definition: 'List the class methods of <object> into an array.'

get_class(<object>) definition: 'Get the name of the class of <object>.'

implode(<array>,<string>) Reduce an array to a string.

list() Assign variables as if they were an array.

md5(rand()) Generate a random 32-bit character string in php.

preg_match definition: 'Perform a regular-experssion match.'

strtotime(<string>) definition: 'Convert date string or time length string to Unix timestamp.'

Facts, Thoughts and Opinions

Convert PHP object to associative array

Convert PHP object to associative array by casting it with the array keyword.

$array =  (array) $object;

PHP Arrays

Create a PHP object without a class definition.

$x = (object) array('field1'=>'A', 'field2'=>'B');

PHP

Detect malicious code in a SQL statement in PHP

<?
function detectMalice($sql) {
    return preg_match("/;\s*(ALTER|CREATE|DELETE|DROP|EXEC|INSERT|MERGE|SELECT|UPDATE)/",$sql);
}
 
function test($sql) {
    if (detectMalice($sql)) {
        echo "MALICIOUS";
    } else {
        echo "GOOD";
    }
    echo ": $sql
";
}
 
test("SELECT * FROM mytable");
test("SELECT * FROM mytable;");
test("SELECT * FROM mytable;DELETE FROM mytable");
test("SELECT * FROM mytable;    DROP mytable");
test("SELECT * FROM mytable;    
    DROP mytable");
?>

Download file directly.

Example for a PDF file.

header("Content-Type: application/pdf");
header('Content-Disposition: attachment; filename="temp.pdf"');
header("Content-Length: ".strlen($pdf));
echo $pdf;
flush();
exit();

htmlToString()

In PHP, this is the easiest way to get a block of HTML into a string.

public function htmlToString() {
    ob_start();
?>
<!-- Your HTML goes here. -->
<?php
    /* Or 'echo' PHP strings or even function results here. */
    $html = ob_get_contents();
    ob_end_clean();
    return $html;
}

Basically, whatever is echoed between the ob_start() and $html = statements goes into the string.

PHP implode() to make INSERT statement

<?php

// array containing data
$array = array(
"name" => "John",
"surname" => "Doe",
"email" => "vog.ecnegilletni|eod.j#vog.ecnegilletni|eod.j"
);

// build query…
$sql = "INSERT INTO table";

// implode keys of $array…
$sql .= " (`".implode("`, `", array_keys($array))."`)";

// implode values of $array…
$sql .= " VALUES ('".implode("', '", $array)."') ";

// execute query…
$result = mysql_query($sql) or die(mysql_error());

?>

PHP implode() function

PHP Magic Constants

__LINE__
__FILE__
__FUNCTION__
__CLASS__
__METHOD__

Images

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  •   Writings

  Sources & Bookmarks

Name/Link Date
Craft 2014-10-23
CSS Tricks 2014-05
date() 2014-05
Debugging PHP in browser’s Javascript console 2014-04-17
Exception class (PHP) 2013-09-05
Laravel 2015-05-31
PHP Arrays 2014-05
PHP implode() function 2014
PHP String Functions 2014-06-10
PHP tutorial Pending
PHP ZipArchive class 2013-08-05
Practical PHP Patterns: Domain Model 2014-07
SoapClient class 2013-09-05
Symfony 2014-08
Tcpdf 2014-08
page revision: 0, last edited: 02 Jun 2014 18:06
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