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• name: description content: This modern PHP tutorial helps you learn how to develop dynamic websites and web applications using PHP from scratch.
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• 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.
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• property: og:site_name content: PHP Tutorial
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• NOT (!) operator
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• Prepend an Element: array_unshift
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• Remove the First Element: array_shift
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• Form Validation
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• Flash Messages
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• Contact Form
• File Upload
• Upload Multiple Files
• PHP Validation
• Sanitize Input
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• Open a File
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• 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()
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