| split() |
breaks a string into an array based on a delimiter |
$arrayName = split("delimiter", $stringName);
Example
$phrase = "Out to lunch";
$words = split(" ", $phrase);
// $words would now be an array with the following values:
// $words[0] = "Out ", $words[1] = "to ", $words[2] = "lunch"
|
|---|
| strtok() |
creates a substring using a predetermined separator |
$varName = strtok($stringName, "delimiter");
Example
$phrase = "Out to lunch";
$firstWord = strtok($phrase, ' ');
// $firstWord would = "Out"
|
|---|
| str_word_count() |
returns the number of words in a string |
$varName = str_word_count($stringName);
Example
$phrase = "Out to lunch";
$wordCnt = str_word_count($phrase');
// $wordCnt would = 3
|
|---|
| str_ireplace() |
replaces a substring with a new value |
$varName = str_ireplace("oldValue", "newValue", $stringName);
Example
$phrase = "Out to lunch";
$phrase = str_ireplace("lunch", "dinner", $phrase);
// $phrase would = "Out to dinner"
|
|---|
rtrim()
ltrim()
trim() |
removes whitespace from the end of a string,
beginning of a string or both ends of a string |
$varName = rtrim($varName);
Example
$words[0] = rtrim($words[0]);
// $words[0] now contains "Out"
|
|---|
| strlen() |
retrieves the number of characters in the string |
$length = strlen($varName);
Example
$room = "Room P109";
$length = str($room);
// $length would contain 9.
|
|---|
| substr() |
retrieves a part of a string |
$varName = substr($origVarName, startPosition, length)
Example
$roomNumber = "Room P109";
$numOnly = substr($roomNumber, 5, 4);
/* or */
$numOnly = substr($roomNumber, 5, strlen($roomNumber ) - 1);
// $numOnly would contain "P109"
|
|---|
| strstr() |
searches for a string within a string |
strstr(stringToSearchIn, stringToSearchFor)
Example
$course = array(
"Web Design I",
"Web Design II",
"PHP Programming",
"Intro to MySQL",
"Beginning Web Programming"
);
foreach ($course as $webCourse) {
if (strstr($webCourse, "Web")) {
print "$webCourse
";
}
}
// This would print on the page:
Web Design I
Web Design II
Beginning Web Programming
|
|---|
| strcmp() |
Compares two strings (case-sensitive) |
result = strcmp(firstString, secondString)
// returns 0 if they match,
// 0 if the second string is smaller
Example
$string1 = "Hello, world!";
$string2 = "Hello, World!";
$same = strcmp($string1, $string2);
if ($same == 0) {
print "They are the same";
} else {
print "They are different";
}
// This would print "They are different" because of capitalization.
|
|---|
| strcasecmp() |
Compares two strings (case-insensitive) |
result = strcmp(firstString, secondString)
// returns 0 if they match,
// 0 if the second string is smaller
Example
$string1 = "Hello, world!";
$string2 = "Hello, World!";
$same = strcmp($string1, $string2);
if ($same = 0) {
print "They are the same";
} else {
print "They are different";
}
// This would print "They are the same" because it is case insensitive.
|
|---|
| strtolower() |
converts a string to lower case |
result = strtolower(string)
Example
$string1 = "Hello, World!";
$ string2 = strtolower($string1);
// $string2 would contain "hello, world!"
|
|---|
| strtoupper() |
converts a string to upper case |
result = strtoupper(string)
Example
$string1 = "Hello, World!";
$string2 = strtoupper($string1);
// $string2 would contain "HELLO, WORLD!"
|
|---|
| ucfirst() |
converts the first letter in a string to upper case |
result = ucfirst(string)
Example
$string1 = "hello, World!";
$string2 = ucfirst($string1);
// $string2 would contain "Hello, World!"
// usfirst does not affect any nonalphabetical characters
// or any other capitalized letters in the string
|
|---|
| ucwords() |
converts the first letter in each word in a string to upper case |
result = ucfirst(string)
Example
$string1 = "hello, world!";
$string2 = ucfirst($string1);
// $string2 would contain "Hello, World!"
|
|---|
