More String Functions in PHP
As you know by now, string functions are very useful in manipulating a string. The list of predefined string functions is huge, so we will discuss only mostly commonly used string functions.
Strlen: This string function will return length of a string.
Ucfirst: This string function will change case of first letter of the string to upper.
Ucwords: This string function will change case of the first letter of every word in the string to upper.
Trim: This string function will remove whitespaces or any predefined characters from both ends of a string.
Strstr: This string function will search for an input string in a given string and if input string is found, it will return rest of the string followed by input string.
Str_repeat: This string function will repeat a given string. It will take a string and integer value as parameter. Integer value represents how many times you want to repeat that string.
Substr: This string function will return a sub string in a given string. It will take as parameters a string, integer value as start of index, and another integer value as number of characters to return.
Strpos: This string function will return index position of input string in a given string.
Strchr: This string function is pretty much similar to strstr. This will return an entire string followed by a specific character.
Str_replace: This string function will replace an input string in a given string.
<?php
$str = "my PHP tutorials for beginners ";
//strlen example
echo strlen($str)."<br />";
//ucfirst example
echo ucfirst($str)."<br />";
//ucwords example
echo ucwords($str)."<br />";
//trim example
echo trim($str)."<br />";
//strstr example
echo strstr($str,"for")."<br />";
//str_repeat example
echo str_repeat($str, 3)."<br />";
//substr example
echo substr($str, 3, 10)."<br />";
//strpos example
echo strpos($str,"PHP")."<br />";
//strchr example
echo strchr($str,"o")."<br />";
//str_reolace example
echo str_replace("PHP", "FWAIT", $str)."<br />";
?>
