PHP Strings: PHP String Functions Explained with Examples

1) PHP string function and explain it.
2) list any five-string function and explain in detail.

strlen

The strlen function is used to find the length of a string.

Let’s find the length of the string “Hello world!”.

echo strlen("Hello world!");

strpos

strpos function is used to search for a string or character within a string.

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Let’s see if we can find the string “world” in our string.

echo strpos("Hello world!","world");

strcmp

The strcmp() function compares two strings.

echo strcmp("Hello world!","Hello world!");

trim

The trim() function removes whitespace and other predefined characters from both sides of a string.

$str = "Hello World!";
echo $str . "";
echo trim($str,"Hed!");

ltrim

ltrim — Removes whitespace or other predefined characters from the left side of a string

$str = "Hello World!";
echo $str . "";
echo ltrim($str,"Hed!");

rtrim

rtrim — Removes whitespace or other predefined characters from the right side of a string

$str = "Hello World!";
echo $str . "";
echo rtrim($str,"Hed!");

ucfirst

The ucfirst() function converts the first character of a string to uppercase.

echo ucfirst("hello world!");

ucwords

The ucwords() function converts the first character of each word in a string to uppercase.

echo ucwords("hello world");

strtolower

The strtolower() function converts a string to lowercase.

echo strtolower("Hello WORLD.");

strtoupper

The strtoupper() function converts a string to uppercase.

echo strtoupper("Hello WORLD!");