phptutorial.net

• charset: UTF-8
• name: viewport content: width=device-width, initial-scale=1
• name: robots content: index, follow, max-image-preview:large, max-snippet:-1, max-video-preview:-1
• name: description content: This modern PHP tutorial helps you learn how to develop dynamic websites and web applications using PHP from scratch.
• property: og:locale content: en_US
• property: og:type content: website
• property: og:title content: PHP Tutorial
• property: og:description content: This modern PHP tutorial helps you learn how to develop dynamic websites and web applications using PHP from scratch.
• property: og:url content: https://www.phptutorial.net/
• property: og:site_name content: PHP Tutorial
• property: article:modified_time content: 2025-04-10T04:07:00+00:00
• name: twitter:card content: summary_large_image
• name: generator content: WordPress 6.9.4
• name: msapplication-TileImage content: https://www.phptutorial.net/wp-content/uploads/2021/03/cropped-favicon-270x270.png
• name: pbstck_context:pbstck_ab_test content: true
• equiv: origin-trial content: AlK2UR5SkAlj8jjdEc9p3F3xuFYlF6LYjAML3EOqw1g26eCwWPjdmecULvBH5MVPoqKYrOfPhYVL71xAXI1IBQoAAAB8eyJvcmlnaW4iOiJodHRwczovL2RvdWJsZWNsaWNrLm5ldDo0NDMiLCJmZWF0dXJlIjoiV2ViVmlld1hSZXF1ZXN0ZWRXaXRoRGVwcmVjYXRpb24iLCJleHBpcnkiOjE3NTgwNjcxOTksImlzU3ViZG9tYWluIjp0cnVlfQ==
• equiv: origin-trial content: Amm8/NmvvQfhwCib6I7ZsmUxiSCfOxWxHayJwyU1r3gRIItzr7bNQid6O8ZYaE1GSQTa69WwhPC9flq/oYkRBwsAAACCeyJvcmlnaW4iOiJodHRwczovL2dvb2dsZXN5bmRpY2F0aW9uLmNvbTo0NDMiLCJmZWF0dXJlIjoiV2ViVmlld1hSZXF1ZXN0ZWRXaXRoRGVwcmVjYXRpb24iLCJleHBpcnkiOjE3NTgwNjcxOTksImlzU3ViZG9tYWluIjp0cnVlfQ==
• equiv: origin-trial content: A9nrunKdU5m96PSN1XsSGr3qOP0lvPFUB2AiAylCDlN5DTl17uDFkpQuHj1AFtgWLxpLaiBZuhrtb2WOu7ofHwEAAACKeyJvcmlnaW4iOiJodHRwczovL2RvdWJsZWNsaWNrLm5ldDo0NDMiLCJmZWF0dXJlIjoiQUlQcm9tcHRBUElNdWx0aW1vZGFsSW5wdXQiLCJleHBpcnkiOjE3NzQzMTA0MDAsImlzU3ViZG9tYWluIjp0cnVlLCJpc1RoaXJkUGFydHkiOnRydWV9
• equiv: origin-trial content: A93bovR+QVXNx2/38qDbmeYYf1wdte9EO37K9eMq3r+541qo0byhYU899BhPB7Cv9QqD7wIbR1B6OAc9kEfYCA4AAACQeyJvcmlnaW4iOiJodHRwczovL2dvb2dsZXN5bmRpY2F0aW9uLmNvbTo0NDMiLCJmZWF0dXJlIjoiQUlQcm9tcHRBUElNdWx0aW1vZGFsSW5wdXQiLCJleHBpcnkiOjE3NzQzMTA0MDAsImlzU3ViZG9tYWluIjp0cnVlLCJpc1RoaXJkUGFydHkiOnRydWV9
• equiv: origin-trial content: A1S5fojrAunSDrFbD8OfGmFHdRFZymSM/1ss3G+NEttCLfHkXvlcF6LGLH8Mo5PakLO1sCASXU1/gQf6XGuTBgwAAACQeyJvcmlnaW4iOiJodHRwczovL2dvb2dsZXRhZ3NlcnZpY2VzLmNvbTo0NDMiLCJmZWF0dXJlIjoiQUlQcm9tcHRBUElNdWx0aW1vZGFsSW5wdXQiLCJleHBpcnkiOjE3NzQzMTA0MDAsImlzU3ViZG9tYWluIjp0cnVlLCJpc1RoaXJkUGFydHkiOnRydWV9

• Skip to content
• https://www.phptutorial.net
• Home
• OOP
• PDO
• Playground
• Privacy policy
• #
• What is PHP
• Install PHP
• Hello, World
• #
• Syntax
• Variables
• Constants
• Comments
• var_dump
• #
• Data types
• Boolean
• Integer
• Float
• String
• Null
• Type Casting
• Type Juggling
• #
• Assignment operators
• Comparison operators
• Logical AND operator (&&)
• Logical OR operator (||)
• Logical NOT operator (!)
• #
• if
• if-else
• if-elseif
• Ternary operator
• switch
• for
• while
• do-while
• break
• continue
• #
• Functions
• Function parameters
• Default parameters
• Named arguments
• Variable scopes
• Type hints
• Strict typing
• Variadic functions
• #
• sort
• Associative Arrays
• foreach
• Multidimensional Array
• array_unshift()
• array_push()
• array_pop()
• array_shift()
• array_keys()
• array_key_exists()
• in_array()
• array_reverse()
• array_merge()
• Spread operator
• list
• Array destructuring
• #
• ksort()
• usort()
• asort()
• uasort()
• uksort()
• #
• Anonymous functions
• Arrow functions
• Variable functions
• #
• isset
• empty
• is_null
• #
• Map
• Filter
• Reduce
• #
• Include
• include_once
• require & require_once
• Using __DIR__ with a file include
• Variable variables
• #
• Cookie
• Session
• #
• PHP form
• filter_has_var() function
• filter_var() function
• filter_input() function
• Form validation
• Checkbox
• Multiple checkboxes
• Radio button
• Select
• CSRF
• Flash messages
• Post-Redirect-Get (PRG)
• File Upload
• Upload multiple files
• Contact form
• Validation
• Sanitize input
• Filter input
• password_hash()
• password_verify()
• #
• Registration
• Login
• Email verification
• Remember me
• #
• Open a file
• Check a File Exists
• Read a file
• Read a file into a string
• Read a file into an array
• Download a file
• Copy a file
• Delete a file
• Rename a file
• Work with CSV Files
• Get the size of a file
• File permissions
• #
• Manage directory
• glob
• dirname
• basename
• pathinfo
• #
• strlen
• substr
• strpos
• str_replace
• implode
• explode
• trim
• ltrim
• rtrim
• htmlspecialchars()
• str_contains()
• str_starts_with()
• str_ends_with()
• strtolower()
• strtoupper()
• ucfirst()
• ucwords()
• #
• Regular expressions
• Character Classes
• Anchors
• Word Boundary
• Sets & Ranges
• Quantifiers
• Greedy Quantifiers
• Non-greedy (or lazy) Quantifiers
• Capturing groups
• Backreferences
• Alternation
• Lookahead
• Lookbehind
• preg_match()
• preg_match_all()
• preg_replace()
• #
• Time
• Date
• What is PHP
• Install PHP
• PHP Hello World
• Syntax
• Variables
• Constants
• Comments
• Data Types
• Boolean
• Integer
• Float
• String
• Heredoc
• NULL
• Type Casting
• Type Juggling
• Arithmetic Operators
• Assignment Operators
• Comparison Operators
• AND (&&) Operator
• OR (||) Operator
• NOT (!) operator
• if
• if else
• if elseif
• switch
• for
• while
• do while
• foreach
• break
• continue
• Functions
• Function Parameters
• Default Parameters
• Named Arguments
• Variable Scopes
• Type Hints
• Strict Typing
• Variadic Functions
• Arrays
• Associative Arrays
• Multidimensional Arrays
• Prepend an Element: array_unshift
• Append an Element: array_push
• Remove the First Element: array_shift
• Remove the Last element: array_pop
• Check If a Key Exists: array_key_exists
• Get all Keys: array_keys
• Check If a Value Exists: in_array
• Merge multiple arrays into one: array_merge
• Reverse the order of array elements: array_reverse
• Spread Operator
• sort
• uasort
• asort
• usort
• ksort
• uksort
• Anonymous Functions
• Arrow Functions
• Variable Functions
• Map Array Elements: array_map
• Filter Array Elements: array_filter
• Reduce Array Elements: array_reduce
• PHP Form
• PHP filter_has_var Function
• PHP filter_var Function
• PHP filter_input Function
• Form Validation
• PHP Checkbox
• Multiple Checkboxes
• Radio Button
• Select Option
• Flash Messages
• PHP CSRF
• PRG (Post-Redirect-Get)
• Contact Form
• File Upload
• Upload Multiple Files
• PHP Validation
• Sanitize Input
• Registration Form
• Login
• Open a File
• Check a File Exists
• Read a File: fread() & fgets()
• Read a File into a String: file_get_contents()
• Download a File
• Create Temp File
• Copy a File
• Delete a File
• Rename a File
• Read CSV Files
• Get the Leng of a String: strlen()
• Search for a Substring in a String: substr()
• Locate the first Occurrence of a Substring: strpos()
• Replace All Occurrences of a Substring: str_replace()
• Join an Array of Strings: implode()
• Split a string by a separator: explode()
• Remove Characters from Both Ends of a String: trim()
• Strip Characters from the Beginning of a String: ltrim()
• Strip Characters fro the End of a String: rtrim()
• Prevent XSS Attack: htmlspecialchars()
• Check If a String contains a Substring: str_contains()
• Check If a String starts with a Substring: str_starts_with()
• Check If a String ends with a Substring: str_ends_with()
• Convert a String to Uppercase: strtoupper()
• Convert a String to Lowercase: strtolower()
• Convert the First Character in a String to Uppercase: ucfirst()
• Convert Each Word in a String Uppercase: ucwords()
• PHP Readonly Properties
• PHP Remember Me
• PHP Email Verification
• PHP filter
• PHP password_verify
• About
• Contact
• Privacy Policy
• phptutorial.net

            Domain Name: PHPTUTORIAL.NET
Registrar: Name.com, Inc.
Domain Status: client transfer prohibited
Creation Date: 2020-02-10T05:21:04Z
Registry Expiry Date: 2027-02-10T05:21:04Z
Updated Date: 2026-02-10T06:31:51Z
Name Server: CORY.NS.CLOUDFLARE.COM
Name Server: TIA.NS.CLOUDFLARE.COM
REGISTRAR Contact: Name.com, Inc.
>>> Last update of RDAP database: 2026-02-11T08:29:03Z         

			User-agent: *
Disallow: /wp-admin/
Disallow: /app/
Allow: /wp-admin/admin-ajax.php        

Τεχνικό SEO

SEO στη σελίδα

Περιεχόμενο και UX