Php pdf free cheat sheet download

Returns the value is x to the power of y. Converts a radian number to a degree. Returns a random integer. Rounds a number to the nearest integer. Returns the sine of a number. Returns the hyperbolic sine of a number. Returns the sqrt of a number. Seeds the random number generator.

Returns the tangent of an angle. Returns the hyperbolic tangent of an angle. Returns the natural logarithm of PI approx. Returns the natural logarithm of 2 approx.

Returns the natural logarithm of 10 approx. Returns the base-2 logarithm of E approx. Returns the base logarithm of E approx. Validates a Gregorian Data. Returns the default time zone. Sets the default time zone. Returns the time of sunrise for the time or location. Returns the time of sunset for the time or location. Returns the current time in microseconds. Returns the Unix timestamp for a date. Formats the local time date according to locale settings. Returns the current time as a Unix timestamp.

Converts a French Republican date to a Julian day count. Converts a Julian day count to a French Republican date. French Republican Calendar.

The number of available calendars. The abbreviated English name of the day of the week. The English name of the day of the week. The abbreviated Gregorian month name. The Gregorian month name. The abbreviated Julian month name. The French Republican month name. Calculate Easter according to the Julian calendar. Changes the current directory. Changes the root directory to the current process. Opens the directory handle and returns an object. Closes the directory handle.

Returns the current directory. Open a directory handle. Returns an entry from the directory handle. Resets a directory handle. Lists the files and directory inside a specified path. Semicolon on windows, colon otherwise. Returns the filename component of a path. Changes the file group. Clears the file status cache. Returns the directory name component of a path.

Returns the free space of a directory. Returns the total size of a directory. Tests for end-of-file on an open file. Flushes buffered output to an open file. Returns a character from an open file. Checks and parses a line in an open file. Returns a line from an open file. Reads a file into an array. Checks whether or not a file or a directory exists. Reads a file into a string. Writes a string to a file. Returns the last access time of a file.

Returns the last change time of a file. Returns the group ID of a file. Returns the inode number of a file. Returns the last modification time of a file. Returns the user ID owner of a file. Returns the permissions of a file. Locks or releases a file. Matches a filename or string against a specified pattern.

Formats a line as CSV and writes it to an open file. Reads from an open file. Returns information about an open file. Returns the current position in an open file. Truncates an open file to a specified length. Writes to an open file. Checks whether a file is a directory. Checks whether a file is executable. Checks whether a file is a regular file. Check whether a file is a link. Checks whether a file is readable. Returns information about a hard link. Returns information about a file or symbolic link.

Moves an uploaded file to a new location. Parses a configuration file. Returns information about a file path. Closes a pipe opened by popen. Reads a file and writes it to the output buffer. Returns the target of a symbolic link. Returns the absolute pathname. Renames a file or directory. Rewinds a file pointer. Removes an empty directory. Sets the buffer size if an open file.

Returns information about a file. Creates a symbolic link. Creates a unique temporary file. Sets access and modification time of a file. Changes file permissions for files. Expands to match 'a', 'b', or 'c'. Return only directory entries which match the pattern. Returns compressed size of an entry in the ZIP file. Returns the actual file size of an entry in the ZIP File. Checks if a variable of a specified input type exist. Allows no flags. Do not encode ' and ". Not in use. Allows a period.

Allows a comma , as a thousands separator in numbers. Allows an e or E for scientific notation in numbers. The URL must contain a path part. The URL must contain a query string. Allows the IP address to be in IPv4 format. Allows the IP address to be in IPv6 format. The value must be a scalar. The value must be an array. Return NULL on failure for unrecognized boolean values. Validates a boolean. Validates value as a valid email address. Validates value as float.

Validates value as integer. Validates value as IP address. Validates value as MAC address. Validates value against a regular expression. Validates value as URL. Removes all illegal characters from an email address. Apply addslashes. Removes special characters. Removes all illegal characters from s URL.

Call a user-defined function to filter data. POST variables. GET variables. ENV variables. Allows you to send emails directly from a script. Changes the current directory on the FTP server. Sets the permissions on a file via FTP.

Closes an FTP connection. Opens an FTP connection. Deletes a file on the FTP server. Returns runtime behaviours of the FTP connection. Downloads a file from the FTP server. Logs on to an FTP connection. Returns the last modified time of a specified file. Creates a new directory on the FTP server.

Downloads a file from the FTP server non-blocking. Uploads a file to the FTP server non-blocking. Turns passive mode on or off. Uploads a file to the FTP server. Returns the current directory name. Sends a raw command to the FTP server. Renames a file or a directory on the FTP server. Removes a directory on the FTP server. Sets runtime options for the FTP connection. Sends a SITE command to the server. Returns the size of the specified file. Returns the system type identifier of the FTP server.

Returns a list of response headers sent or ready to send. Creates a namespaces context for the next XPath query. Get dotted libxml version e.

Set default DTD attributes. Do not show error reports. Stop network access while loading documents. Do not show warning reports. Drop the XML declaration when saving a document. Remove excess namespace declarations. Use XInclude substitution.

Get libxml version e. Gets the current column number from the XML parser. Set handler function for unparsed entity declarations. Turns on or off auto committing database modifications.

Changes the user of the specified database connection. Returns the MySQL client version as a string. Closes a previously opened database connection. Commits the current transaction. Returns the error code from the last connect call. Returns a string description of the last connect error.

Open a new connection to the MySQL server. Performs debugging operations. Dump debugging information into the log. Returns the error code for the most recent function call. Returns a list of errors from the last command executed. Returns a string description of the last error. Returns the number of columns for the most recent query. Returns a character set object. Returns client per-process statistics. Returns statistics about the client connection. Returns the version of the MySQL protocol used.

Returns the version of the MySQL server as an integer. Returns the auto generated id used in the last query. Asks the server to kill a MySQL thread. Performs a query on a database. Prepare a SQL statement for execution.

Performs a query on the database. Opens a connection to a mysql server. Get the result from async query. Rolls back current transaction.

Returns RPL query type. Selects the default database for database queries. Send the query and return. Sets the default client character set.

Used for establishing secure connections using SSL. Gets the current system status. Transfers a result set from the last query. Returns the thread ID for the current connection. Returns whether thread safety is given or not. Initiate a result set retrieval. Used to get the current value of a statement attribute. Used to modify the behaviour of a prepared statement.

Binds variables to a prepared statement as parameters. Seeks to an arbitrary row in statement result set. Returns a string description for last statement error. Returns the number of fields in the given statement. Get the ID generated from the previous insert operation. Return the number of rows in statements result set. Returns the number of parameters for the given statement.

Returns result set metadata from a prepared statement. Transfers a result set from a prepared statement. Get current field offset of a result pointer. Fetch a result row as an associative array. Fetch meta-data for a single field. Returns the next field in the result set. Returns the current row of a result se as an object. When you include them in the script that collects the form data, you can effectively strip harmful scripts of the characters they need for functioning, rendering them unusable.

We have already talked about the necessary tools to do so. For example, you can simply define variables for your form fields and use the empty function to check if they have values. The next step is to check the submitted data for validity. Performs a multiline search patterns that search for the beginning or end of a string will match the beginning or end of each line.

Use parentheses to apply quantifiers to entire patterns. They cal also be used to select parts of the pattern to be used as a match. Filters are used to validate and filter data that is coming from insecure sources. As mentioned, a common example is user input. PHP offers a number of filter functions and constants for that:. Knowing your way around PHP is a good idea for anyone interested in web design and web development.

Especially if you want to dive deeper into the technical aspects of creating your own website. Bookmark it as a reference or use it as a springboard to learn more about the programming language. We sincerely hope you have found it a useful resource. Twitter Facebook. Last updated: Sep 3, 12 Comments. With a focus on business sites, it features multiple sections on the front page as well as widgets, navigation and social menus, a logo, and more.

Personalize its asymmetrical grid with a custom color scheme and showcase your multimedia content with post formats. Our default theme for works great in many languages, for any abilities, and on any device.

Version: 1. Use it to make something cool, have fun, and share what you've learned with others. Variables and Constants Similarly to most other programming languages, PHP lets you work with variables and constants. Defining Variables To do anything with variables, you first need to define them. They must have at least one digit and no decimal point. It can be in decimal, hexadecimal, or octal.

Floats — This is the name for numbers with a decimal point or in exponential form. Strings — This simply means text. We will talk about it in detail further below. Arrays — Arrays are variables that store several values. We will talk about them in detail further below. Objects — Objects store both data and information on how to process it. Resources — These are references to functions and resources outside of PHP. Variable Scope Variables can be available in different scopes, meaning the part of a script you can access them.

Predefined Variables PHP also comes with a number of default variables called superglobals. Is it ". Just wrap your text in ' markers and PHP will handle it as a string. Double quotes — As an alternative you can use ". Close it in another line by repeating the identifier. Learn more about us or contact us. ACN Company Number August 14, What is HTML? HTML Doesn't support audio and video without flash player support.

Uses cookies to store temporary data. Doesn't allow JavaScipt to run in the browser. Allows for vector graphics by using different technologies like VML, Silver-light, and Flash, among others. Doesn't allow drag and drop effects. Works with all older browsers. Less mobile-friendly. Doctype declaration is long and complicated. Doesn't have elements like nav and header, as well as attributes like charset, async, and ping.

Extremely difficult to get true GeoLocation of users by using a browser. Can't handle inaccurate syntax. Uses SQL databases and application cache to store offline data. Allows drag and drop effects. Make it possible to draw shapes. Supports all new browsers like Firefox, Mozilla, Chrome, and Safari. More mobile-friendly. Doctype declaration is simple and easy. Has new elements for web structures like nav, header, and footer, among others, and also has attributes of charset, async, and ping.

Makes character encoding simple and easy.