PHP string Methods

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• String Length Calculation Methods
• String Trimming Methods
• Substring Manipulation Methods
• Case Conversion Methods
• String Reversal Methods
• String Searching Methods
• String Repeating and Shuffling Methods

PHP String Length Calculation Methods

strlen():

Returns the length of a string.

$string = "Hello, World!";
$length = strlen($string);
echo $length; // Output: 13
    

PHP String Trimming Methods

trim():

Removes whitespace or other characters from the beginning and end of a string.

$string = "   Hello, World!   ";
$trimmed = trim($string);
echo $trimmed; // Output: "Hello, World!"
    

ltrim():

Removes whitespace or other characters from the beginning of a string.

$string = "   Hello, World!   ";
$trimmed = ltrim($string);
echo $trimmed; // Output: "Hello, World!   "
    

rtrim():

Removes whitespace or other characters from the end of a string.

$string = "   Hello, World!   ";
$trimmed = rtrim($string);
echo $trimmed; // Output: "   Hello, World!"
    

PHP Substring Manipulation Methods

substr():

Returns a part of a string.

$string = "Hello, World!";
$substring = substr($string, 7);
echo $substring; // Output: "World!"
    

substr_replace():

Replaces a part of a string with another string.

$string = "Hello, World!";
$replaced_string = substr_replace($string, "Universe", 7);
echo $replaced_string; // Output: "Hello, Universe!"
    

PHP Case Conversion Methods

strtolower():

Converts a string to lowercase.

$string = "Hello, World!";
$lowercase_string = strtolower($string);
echo $lowercase_string; // Output: "hello, world!"
    

strtoupper():

Converts a string to uppercase.

$string = "Hello, World!";
$uppercase_string = strtoupper($string);
echo $uppercase_string; // Output: "HELLO, WORLD!"
    

ucfirst():

Converts the first character of a string to uppercase.

$string = "hello, world!";
$capitalized_string = ucfirst($string);
echo $capitalized_string; // Output: "Hello, world!"
    

lcfirst():

Converts the first character of a string to lowercase.

$string = "Hello, World!";
$lowercased_first_string = lcfirst($string);
echo $lowercased_first_string; // Output: "hello, World!"
    

PHP String Reversal Methods

strrev():

Reverses a string.

$string = "Hello, World!";
$reversed_string = strrev($string);
echo $reversed_string; // Output: "!dlroW ,olleH"
    

PHP String Searching Methods

strpos():

Finds the position of the first occurrence of a substring in a string.

$string = "Hello, World!";
$position = strpos($string, ",");
echo $position; // Output: 5
    

stripos():

Finds the position of the first occurrence of a case-insensitive substring in a string.

$string = "Hello, World!";
$position = stripos($string, "WORLD");
echo $position; // Output: 7
    

strripos():

Finds the position of the last occurrence of a case-insensitive substring in a string.

$string = "Hello, World! Hello, Universe!";
$position = strripos($string, "HELLO");
echo $position; // Output: 13
    

strstr():

Finds the first occurrence of a string within another string.

$string = "Hello, World!";
$substring = strstr($string, "World");
echo $substring; // Output: "World!"
    

strchr():

Alias of strstr().

PHP String Repeating and Shuffling Methods

str_shuffle():

Randomly shuffles all characters of a string.

$string = "Hello, World!";
$shuffled_string = str_shuffle($string);
echo $shuffled_string; // Output: "rHloo,W l!odle"
    

str_repeat():

Repeats a string a specified number of times.

$string = "Hello, ";
$repeated_string = str_repeat($string, 3);
echo $repeated_string; // Output: "Hello, Hello, Hello, "