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Embedded PHP in HTML 5 & Strings in PHP

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Presentation on theme: "Embedded PHP in HTML 5 & Strings in PHP"— Presentation transcript:

1 Embedded PHP in HTML 5 & Strings in PHP

2 Embedded PHP in HTML 5 <html> <body> <h1>My first PHP page</h1> <?php echo "Hello World!"; ?> </body> </html>

3 Strings and Regular Expression in PHP
A string is a sequence of characters, like "Hello world!". PHP String Functions: Get The Length of a String The PHP strlen() function returns the length of a string.

4 Continued.. The example below returns the length of the string "Hello world!": <?php echo strlen("Hello world!"); // outputs 12 ?> Output: 12

5 Continued.. Count The Number of Words in a String
The PHP str_word_count() function counts the number of words in a string: <?php echo str_word_count("Hello world!"); // outputs 2 ?> The output of the code above will be: 2.

6 Continued.. Reverse a String
The PHP strrev() function reverses a string: <?php echo strrev("Hello world!"); // outputs !dlrow olleH ?>

7 Continued.. Search For a Specific Text Within a String
The PHP strpos() function searches for a specific text within a string. If a match is found, the function returns the character position of the first match. If no match is found, it will return FALSE.

8 Continued.. The example below searches for the text "world" in the string "Hello world!": <?php echo strpos("Hello world!", "world"); // outputs 6 ?> The output of the code above will be: 6. Note: The first character position in a string is 0 (not 1).

9 Continued.. Replace Text Within a String
The PHP str_replace() function replaces some characters with some other characters in a string. The example below replaces the text "world" with "Dolly": <?php echo str_replace("world", "Dolly", "Hello world!"); // outputs Hello Dolly! ?>

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