String Functions in PHP
String is used to handle a function it is a sequence of characters .There are some of the string with example.
1. addcslashes :-
It return the String with backslashes before the character.
<?php
echo addcslashes('Hello[ ]', 'A..z');
?>Output
\H\e\l\l\o\[ \]
2. addslashes :-
As the name indicate it add the backslashes before the character that are large or liberated or leading character of a string.
<?php
$string = "O'My god your are totally change.";
echo addslashes($string);
?>Output
O\'My god your are totally change.
3. bin2hex :-
It is used to convert the binary data in hexadecimal format in byte wise containing the largest-nibble first.
$binary = "11110000";
$hexa = dechex(bindec($binary));
echo $hexa;
?>Output
f0
4. chop :-
It is used to delete the last character or space from the right side of the string.
<?php
echo "<pre>";//without <pre> you cann't get correct output
echo chop(" Aroundthe ");
echo chop("Aroundtheworld", "a..z");
echo "</pre>";
?>Output
AroundtheA
5. chr :-
It is used to return one character string in a single byte from a number.
<?php
echo chr(-159), chr(503), PHP_EOL;
?>Output
a�
6. chunk-split :-
This function is used to divide (tear) the string into small block.
<?php
$string = "This is demo!";
echo chunk_split($string,2,".");
?>Output
Th.is. i.s .de.mo.!.
7. convert_cyr_string :-
It is used to convert the string from one cyrillic character to the another.
<?php
$string = "Good Morning have a nice day! وّه";
echo $string . "<br>";
echo convert_cyr_string($string,'m','a');
?>Output
Good Morning have a nice day! وّه
Good Morning have a nice day! � � �
8. convert_uudecode :-
It is used to convert the string decode to uuencoded.
<?php
$string = "A2&D@979E<GEO;F4@=&AI<R!I<R!A(&1E;6\@8VQA<W,N";
echo convert_uudecode($string);
?>Output
Hi everyone this is a demo class.
9. count_chars :-
It counts the number that are pass through every byte and return information about the characters that are used in a String.
<?php
$str = "This is devstudioonline!";
echo count_chars($str,3);
?>Output
!Tdehilnostuv
10. crc32 :-
It gives the result in crc32 polynomial of String.
<?php
$string = crc32("Hello Everyone!");
printf("%u\n",$string);
?>Output
265055217
11. echo :-
It is used to give the output of the string.
<?php
echo "Hello World";
?>Output
Hello World
12. explode :-
It crack the string by a string.
<?php
$text1 = "hello";
$text2 = "Students welcome back";
$text3 = ',';
var_dump( explode( ',', $text1 ) );
var_dump( explode( ',', $text2 ) );
var_dump( explode( ',', $text3 ) )
?>Output
array(1) { [0]=> string(5) "hello" } array(1) { [0]=> string(21) "Students welcome back" } array(2) { [0]=> string(0) "" [1]=> string(0) "" }
13. get_html_translation_table :-
It is used to print a translation table by using htmlspecialchars function.
<?php
print_r (get_html_translation_table());
?>Output
Array ( ["] => " [&] => & [<] => < [>] => > )
14. hebrev :-
It is used to convert the herbew text into visual text.
<?php
echo hebrev("באינטרנט");//devstudioonline
?>Output
באינטרנט
15. hebrevc :-
It is used to convert the herbew text into visual text from the new line.
<?php
echo hebrevc("ב חשון התשסג\nב חשון התשסג");
?>Output
חשון התשסג
ב חשון התשסג
16. hex2bin :-
It decode the hexadecimal and encode in binary string.
<?php
echo hex2bin("48656c6421f72620576c6421");
?>Output
Held!�& Wld!
17. html_entity_decode :-
It convert all the html item into suitable character.
<?php
$string = '<a href="https://www.devstudioonline.com">devstudioonline.com</a>';
echo html_entity_decode($string);
?>Output
18. htmlentities :-
It convert all the suitable character into html entities.
<?php
$string = '<a href="https://www.devstudioonline.com">devstudioonline.com</a>';
echo htmlentities($string);
?>Output
<a href="https://www.devstudioonline.com">devstudioonline.com</a>
19. htmlspecialchars_decode :-
It is used to convert Html item into characters.
<?php
$string = "The quick brown fox <b>jumps over the lazy</b> dog.";
echo htmlspecialchars_decode($string);
?>Output
The quick brown fox jumps over the lazy dog.
20. htmlspecialchars :-
It is used to convert special character into Html.
<?php
$string = "Students <b>welcome back</b>to the class .";
echo htmlspecialchars($string);
?>Output
Students <b>welcome back</b>to the class .
21. implode :-
It is join the array elements and convert it in string.
<?php
$array = array('Hello','Student!','have', 'a', 'nice','day.');
echo implode(" ",$array);
?>Output
Hello Student! have a nice day.
22. join :-
It work same as implode it is also called a implode.
<?php
$array = array('Hello','Student!','have', 'a', 'nice','day.');
echo join(" ",$array);
?>Output
Hello Student! have a nice day.
23. lcfirst :-
It is used to convert the first character of the string in lowecase.
<?php
echo lcfirst("Hello Students Welcome Back!");
?>Output
hello Students Welcome Back!
24. levenshtein :-
It is used to calculate the levenshtein distance between the two string.
<?php
echo levenshtein("Hello Student this is a demo class","ello Student");
echo "<br>";
echo levenshtein("Hello Everyone","ello Everyone",12,30,34);
?>Output
22
34
25. localeconv :-
It is used to get the information about numeric formatting.
<?php
setlocale(LC_ALL,"INDIA");
$locale_info = localeconv();
print_r($locale_info);
?>Output
Array ( [decimal_point] => . [thousands_sep] => [int_curr_symbol] => [currency_symbol] => [mon_decimal_point] => [mon_thousands_sep] => [positive_sign] => [negative_sign] => [int_frac_digits] => 127 [frac_digits] => 127 [p_cs_precedes] => 127 [p_sep_by_space] => 127 [n_cs_precedes] => 127 [n_sep_by_space] => 127 [p_sign_posn] => 127 [n_sign_posn] => 127 [grouping] => Array ( ) [mon_grouping] => Array ( ) )
26. ltrim :-
It remove the space or the characters from the begining of the string.
<?php
$string = "The quick brown fox jumps over the lazy dog!";
echo $string . "<br>";
echo ltrim($string ,"The quick brown fox");
?>Output
The quick brown fox jumps over the lazy dog!
jumps over the lazy dog!
27. md5 :-
It is used to calculate md5 hash of the string.
<?php
$string = "Example";
echo md5($string);
?>Output
9a9fe2faa55510a85a4feb8dc776654d
28. metaphone :-
It is used to calculate the string of metaphone.
<?php
echo metaphone(" This is Example");
?>Output
0SSKSMPL
29. money_format :-
It format the number in currency string.
<?php
$num = 678000;
setlocale(LC_MONETARY,"inr_INDIA");
echo money_format("The price is %i", $num);
?>Output
The price is 678000.00
30. nl2br :-
It breaks the HTML line and start all newlines in a string.
<?php
echo nl2br("The quick brown fox.\njumps over the lazy dog.");
?>Output
The quick brown fox.
jumps over the lazy dog.
31. number_format :-
It format the number in the group of thousands.
<?php
echo number_format("1000000000")."<br>";
echo number_format("450000000",2)."<br>";
echo number_format("90000000",5,",",".");// 5 add 5 zero in the last of digits.
?>Output
1,000,000,000
450,000,000.00
90.000.000,00000
32. ord :-
It convert the first byte string value between between 0 to 255.
<?php
echo ord("D")."<br>";
echo ord("DevstudioOnline")."<br>";
?>Output
68
68
33. parse_str :-
It parses the string into variables.
<?php
parse_str("name=John Deo&dob=12/03/1992");
echo $name."<br>";
echo $dob;
?>Output
John Deo
12/03/1992
34. print :-
It give the output in a string format.It work same as echo both are very similar.
<?php
print "<h2>PHP is Fun!</h2>";
print "Hello Students!<br>";
print "This is a example of print function!<br>";
?>Output
PHP is Fun!
Hello Students!
This is a example of print function!
35. printf :-
It give the ouput in proper arrange (formatted) string.
<?php
$number = 29;
$string = "India";
printf("There are %u States in %s.",$number,$string);
?>Output
There are 29 States in India.
36. quoted_printable_decode :-
It convert the quoted printed string in 8 bit.
<?php
$string = "This is a=0Ademo.";
echo quoted_printable_decode($string);
?>Output
This is a demo.
37. quotemeta :-
It add the backslash in front of predefined characters in a string.
<?php
$string = "Hello students. (can you hear me?)";
echo quotemeta($string);
?>Output
Hello students\. \(can you hear me\?\)
38. rtrim :-
It remove the whitespace and or other character from the end of string.
<?php
$string = "Hello Students!";
echo $string . "<br>";
echo rtrim($string,"Students!");
?>Output
Hello World!
Hello
39. similar_text :-
It is used to calculate the similarity between the two strings.
<?php
echo similar_text("Hello Students","Hello Everyone this is a demo");
?>Output
9
40. soundex :-
It is used to calculate the soundex key of a string.
<?php
$string = "Jump to the next lesson";
echo soundex($string);
?>Output
J513
41. sprintf :-
It give the ouput in proper arrange (formatted) string by replacing the % sign by a variable.
<?php
$number = 29;
$string = "India";
$text = sprintf("There are %u States in %s.",$number,$string);
echo $text;
?>Output
There are 29 States in India.
42. sscanf :-
It translate the string according to the formate.
<?php
$string = "age:20 height:5.8";
sscanf($string,"age:%d height:%d",$age,$height);
// show types and values
var_dump($age,$height);
?>Output
int(20) int(5)
43. str_ireplace :-
It is used to replace the character.
<?php
echo str_ireplace("HELLO","Students","we are HELLO!");
?>Output
we are Students!
44. str_pad :-
It pad a string from the right side upto 20 characters of length.
<?php
$string = "Hello Students";
echo str_pad($string,20,".");
?>Output
Hello Students......
45. str_repeat :-
It is used to repeat a string.
<?php
echo str_repeat(".",18);
?>Output
..................
46. str_replace :-
It replace all the instance of the search string with a proxy string.
<?php
echo str_replace("Sudents","John Deo","Hello Sudents!");
?>Output
Hello John Deo!
47. str_rot13 :-
It is used to encode and decode a string by using rot13.
<?php
echo str_rot13("Good morning Students");
echo "<br>";
echo str_rot13("hanbwj jljqasv");
?>Output
Tbbq zbeavat Fghqragf
unaojw wywdnfi
48. str_shuffle :-
It is used to jumble a string.
<?php
echo str_shuffle("This is a demo class");
?>Output
eiisTo s asmdslach
49. str_split :-
It is used to convert a string in an array.
<?php
print_r(str_split("Australia"));
?>Output
Array ( [0] => A [1] => u [2] => s [3] => t [4] => r [5] => a [6] => l [7] => i [8] => a )
50. str_word_count :-
It is used to count the word in a given string.
<?php
echo str_word_count("World is full of dishonest people!");
?>Output
6
51. strcasecamp :-
It is used to campare a two case-insensitive string.
<?php
echo strcasecmp("GOOD MORNING EVERYONE!","Hi everyone!");
?>Output
-1
52. strchr :-
It is also known as strstr() .It find the first instance of a string and return the rest of the string.
<?php
echo strchr("Keep your planet safe!","planet");
?>Output
planet safe!
53. strcmp :-
It is used to compare a two string which are case sensitive.
<?php
echo strcmp("clean earth will bless you with longer life!"," bless you with longer life!");
?>Output
1
54. strcoll :-
It is used to compare a local string.
<?php
setlocale (LC_COLLATE, 'NL');
echo strcoll("Think about water conservation.”!","Hello Students!");
echo "<br>";
setlocale (LC_COLLATE, 'en_US');
echo strcoll("Hello Students!","Save water!");
?>Output
12
-11
55. strcspn :-
It is used to print a number of character of a given string.
<?php
echo strcspn("Save Water To Secure Your Future!","r");
?>Output
9
56. strip_tags :-
It remove(strip) the HTML and PHP tag and form a string.
<?php
echo strip_tags("Example <i>of</i> <i>strip_tags</i>");
?>Output
Example of strip_tags
57. stripslashes :-
It remove the backslash from the string.
<?php
echo stripslashes("I\'m selfish. ..");
?>Output
I'm selfish. ..
58. stristr :-
It is used as a case- insensitive. It return all the string fromthe starting from the first event to the last.
// Test the string is found or not
<?php
$string = 'Hello Students!';
if(stristr($string, 'example') === FALSE) {
echo '"This is a example of strisstr';
}
?>Output
"This is a example of strisstr
59. strlen :-
It is used to find the length of the string.
<?php
$str = 'Devstudio';
echo strlen($str); // 9
//It count the space also
$str = 'on line';
echo strlen($str); // 6
?>Output
96
60. strnatcasecmp :-
It is used to compare the algorithm which is case insensitive of the string in a natural order.
<?php
echo strnatcasecmp("10Life Success!","7Success Life!");
?>Output
1
61. strnatcmp :-
It is used to compare the algorithm of the string in a natural order.
<?php
$array1 = $array2 = array("234", "789", "456", "123");
echo "Standard string comparison\n";
usort($array1, "strcmp");
print_r($array1);
echo"<br>";
echo "\nNatural order string comparison\n";
usort($array2, "strnatcmp");
print_r($array2);
?>Output
Standard string comparison Array ( [0] => 123 [1] => 234 [2] => 456 [3] => 789 )
Natural order string comparison Array ( [0] => 123 [1] => 234 [2] => 456 [3] => 789 )
62. strpbrk :-
It find the string for any set of characters.
<?php
$text = 'Hi everyone i am using Devstudioonline.';
echo strpbrk($text, 'hi');
echo strpbrk($text, 'S');
?>Output
i everyone i am using Devstudioonline.
63. strpos :-
It find the position of first instance of a substring in a string.
<?php
echo strpos("Failure will never overtake me, if my determination to succeed is strong enough.!","strong");
?>Output
66
64. strrchr :-
It is used to find the last instance of a character in a string.
<?php
echo strrchr("Today is Monday.","Monday");
?>Output
Monday.
65. strrev :-
It is used to reverse a string.
<?php
echo strrev("Everyday is a new day");
?>Output
yad wen a si yadyrevE
66. strripos :-
It is used to find the position of a last instance of a string.
<?php
echo strripos("Start a new day, with PHP!","day");
?>Output
12
67. strrchr :-
It find the last event of character in a string.
<?php
echo strrchr("Hello Students!","Students");
?>Output
Students!
68. strrev :-
It is used to reverse the string.
<?php
echo strrev("Hello students how are you!");
?>Output
!uoy era woh stneduts olleH
69. strripos :-
It catch the position of the case-sensitive substring last event in a string.
<?php
$first_name = 'John';
$last_name = 'Doe';
$user = strripos($first_name, $last_name);
if ($user === false) {
echo "Hi everyone my name is ($first_name) ($last_name)";
} else {
echo "Congratulations!\n";
echo " ($first_name) ($last_name) you win the task ($user)";
}
?>Output
Hi everyone my name is (John) (Doe)
70. strrpos :-
It catch the position of the substring last event in a string.
<?php
echo strrpos("I like to study php, I love php !","php");
?>Output
28
71. strstr :-
It is used to find the first instance of a string.
<?php
$email = 'devstudioonline@.com';
$domain = strstr($email, '@');
echo $domain;
$name = strstr($email, '@', true);
echo $name;
?>Output
@.comdevstudioonline
72. strspn :-
It is used to find the length first segment of the string and it contained all characters in a given mask.
<?php
echo strspn("Hello Everyone!","kHlleo");
?>Output
5
73. strtok :-
It divide the string in small token and each token are define by any character from token.
<?php
$token_A = strtok('/devstudioonline', '/');
$token_B = strtok('/');
var_dump($token_A, $token_B);
?>Output
string(15) "devstudioonline" bool(false)
74. strtolower :-
It convert the string in lowercase character.
<?php
$string = "THE QUICK BROWN FOX JUMPS OVER THE LAZY DOG.";
$string = strtolower($string);
echo $string;
?>Output
the quick brown fox jumps over the lazy dog.
75. strtoupper :-
It convert the string in uppercase character.
<?php
$string = "The quick brown fox jumps over the lazy dog.";
$string = strtoupper($string);
echo $string;
?>Output
THE QUICK BROWN FOX JUMPS OVER THE LAZY DOG.
76. strtr :-
It change the substring and translate the characters.
<?php
$restore = array("e" => "-", "everyone" => "using", "using" => "everyone");
echo strtr("Hi everyone i am using devstudio online", $restore);
?>Output
Hi using i am everyone d-vstudio onlin-
77. substr-compare :-
It is used to compare two string.
<?php
echo substr_compare("Save world","Save Tree",2);
?>Output
1
78. substr_count :-
It return the number from the substring instance.
<?php
echo substr_count("Hello Students. This is extra class","extra");
?>Output
1
79. substr_replace :-
It replace the text from the string.
<?php
echo substr_replace("Good","Morning",2); // 0 will start replacing the first character in the string
?>Output
GoMorning
80. substr :-
It return the part of the string or length of the string.
<?php
echo substr("Good Evening",4);
?>Output
Evening
81. trim :-
It remove the whitespace or other character from the begining and from the end of string.
<?php
$string = "Good Morning!";
echo $string . "<br>";
echo trim($string,"Gdg!");
?>Output
Good Morning!
ood Mornin
82. ucfirst :-
It make the first character of the string in uppercase.
<?php
echo ucfirst("coming Soon !");
?>Output
Coming Soon !
83. ucwords :-
It change the first character of the string in uppercase.
<?php
echo ucwords("change the Text world");
?>Output
Change The Text World
84. vprintf :-
It give the output in proper string format.
<?php
vprintf("%04d-%02d-%02d", explode('-', '1993-3-4'));
?>Output
1993-03-04
85. vsprintf :-
It return a string in a proper format.
<?php
print vsprintf("%02d-%2d-%02d", explode('-', '1993-3-4'));
?>Output
1993- 3-04
86. wordwrap :-
By using the string break character it cover a string with a given number of character.
<?php
$txt = "This is a example of wordwrap in php .";
$newtext = wordwrap($txt, 10, "<br />\n");
echo $newtext;
?>Output
This is a
example of
wordwrap
in php .