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PHP Strings Primer
By: Matt Wade
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    2003-07-11

    Table of Contents:
  • PHP Strings Primer
  • The Basics
  • Single Quotes
  • Double Quotes
  • Heredoc
  • Concatenation
  • Displaying Strings
  • echo
  • print
  • printf
  • Strings Formatting
  • Preparing user input for comparisons
  • Capitalization
  • Reversing strings
  • Padding strings
  • Multiple Lines
  • Data Preparation
  • Adding and Removing Slashes
  • Dealing with HTML Tags and Entities
  • Counting
  • Checking password strength
  • Generating Statistics
  • Substrings (and searching)
  • Extracting Substrings
  • Counting Paragraphs
  • Filtering Words
  • Working with email addresses
  • Manually Stripping Tags
  • Password Strength Revisited
  • Handling URLs and Base64-encoding
  • Parsing URLs
  • Encoding for URLs
  • Encoding for Email
  • Hashing
  • Verifying Integrity
  • User Authentication
  • Conclusion

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    PHP Strings Primer - Handling URLs and Base64-encoding


    (Page 30 of 37 )

    Dealing with URLs and email is a common task in PHP. In this section, we will show you how to parse a URL into its individual parts, properly pass data through a URL, and prepare data for transmission through email. The functions that will be covered are as follows:

  • parse_url(url) -Using this function, we can break a URL down into its individual components.
  • urlencode(string) -This function will convert applicable non-alphanumeric characters into a format acceptable for passing the data through a URL.
  • urldecode(string) -Any encoding done with urlencode can be reversed with this function.
  • base64_encode(string) -Preparing binary data for transmission in an email is done with this function.
  • base64_decode(string) -This function will decipher the data encoded with 'base64_encode'.

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