Search Results for: php array

The PHP parse_url() function processes a given URL and divides it into its individual components.  Here’s how to use it. parse_url() is often used to get the host/domain name from a given URL or the path to a remote host file. Syntax for parse_url() parse_url ( $url , $component ) Note that: $url is the URL (e.g., https://www.linuxscrew.com) which you want to parse Relative URLs may not be parsed correctly $component is optional and can be one of: PHP_URL_SCHEME, PHP_URL_HOST, PHP_URL_PORT, PHP_URL_USER, PHP_URL_PASS, PHP_URL_PATH, PHP_URL_QUERY or PHP_URL_FRAGMENT … Read more

This article shows you how to use the PHP isset() function to check whether a variable exists and is populated. So, it’s checking if a variable is set. Why would you want to do this? You can’t perform actions on a variable that doesn’t exist or that has no value – you’ll either get unexpected output or an error. So, being able to check that a variable is set and is populated is pretty useful. Syntax for isset() isset ( $var1 , $var2…) Note that: $var1 should be … Read more

The PHP programming language includes various built-in variable types and allows you to create your own complex object classes. Third-party packages also come with their own object classes. So it’s useful to find out what type of variable a variable is, its value, and the type/value of any properties or values the variable may contain. The PHP var_dump() function returns a given variable or value’s properties, including the value and type. It works through the variable’s properties or value recursively doing the same. Read on to learn … Read more

Looping over arrays and iterating over an object’s attributes form the foundation of a lot of application logic. The foreach construct in PHP can do both and is a crucial tool for building your application logic. PHP foreach Syntax The syntax for a foreach construct in PHP is as follows: foreach (iterable_expression as $value) { # statement(s) } Or, if you also wish to access the array key as well: foreach (iterable_expression as $key => $value) { # statement(s) } Note that: iterable_expression is the variable or value to … Read more

As you get more confident with your PHP code, your code will get more and more complex. The PHP switch statement simplifies your PHP logic, replacing messy if statements when trying to make simple decisions based on the value of a variable. Read on to find out how to use it. PHP switch Syntax switch($v) { case $a: # Code to be executed if $v is equal to $a break; case $b: # Code to be executed if $v is equal to $b break; case $c: # Code to … Read more

The PHP str_replace() function replaces words or sections (known as substrings) in a string with other words or sentences, allowing you to modify or reformat text values (find and replace text). Syntax str_replace ( $search , $replace , $subject [, &$count ] ) Note that: $search is the string value being searched for – it can even be an array of strings if you wish to search for multiple values $replace is the value you wish to replace the $search value with – it can also be an array if … Read more

PHP is one of the most popular programming languages used to develop web applications and APIs. Linux is the system of choice for serving up your PHP code and is also an ideal PHP development environment. The PHP explode function is vital for processing user input. It takes a string (a series of characters) and splits it up into smaller strings by a given delimiter to specify the boundary of where the splits should occur. Syntax explode ( $delimiter , $string [, $limit ] ) Note that: $delimiter … Read more