PHP String Programs

Last Updated : 23 Jul, 2025

Strings can be seen as a stream of characters. For example, ‘G’ is a character, and ‘GeeksforGeeks’ is a string. This article contains a list of all programming articles based on String in PHP that are majorly asked in Interviews.

S. No.	Articles
1	PHP Program to Read Each Character of a String
2	PHP Program to Check for Substring in a String
3	PHP Program to Replace String
4	PHP Program to Get the Last Character of a String
5	PHP Program to Get the Position of a Character in a String
6	PHP Program to Insert a Line Break in a String
7	PHP Program to Check if a String Contains a Substring
8	PHP Program to Get the Last n Characters of a String
9	PHP Program to Check a String is a Rotation of Another String
10	PHP Program to Limit String Length
11	PHP Program to Replace a Word Inside a String
12	PHP Program to Check for Empty String
13	PHP Program to Prepend a String
14	PHP Program to Get a Substring Between Two Strings
15	PHP Program to Write Multi-Line Strings
16	PHP Program to Get the First Word of a Sentence
17	PHP Program to Convert Array to String
18	PHP Program to Extract Numbers From a String
19	PHP Program to Get Different Characters in the Given String
20	PHP Program to Find Number of Characters in a String
21	PHP Program to Insert String at Specified Position
22	PHP Program to Encrypt and Decrypt a String
23	PHP Program to Concatenation of Two Strings
24	PHP Program to Put String in Array and Split by New Line
25	PHP Program to Change Strings in an Array to Uppercase
26	PHP Program to Remove Special Character from String
27	PHP Program to Remove All Non-Printable Characters in a String
28	PHP Program to Generating Random String
29	PHP Program to Print All Permutations of a Given String
30	PHP Program to Repeat a String to a Specific Number of Times
31	PHP Program to Replace Multiple Characters in a String
32	PHP Program to Remove the First Character of a String
33	PHP Program to Find the Length of the Last Word in a String
34	PHP Program to Generate a Random, Unique, Alphanumeric String
35	PHP Program to Get String Length
36	PHP Program to Find Minimum Rotations that Required to Get the Same String
37	PHP Program to Remove Line Breaks from the String
38	PHP Program to Convert a String into Number
39	PHP Program to Extract Numbers from String
40	PHP Program to Convert Uppercase String to Lowercase
41	PHP Program to Convert an Integer Into a String
42	PHP Program to String Comparison using == vs strcmp() Function
43	PHP Program to Sort Array of Strings in Natural and Standard Orders
44	PHP Program to Print All the Values of an Array
45	PHP Program to Create Comma Separated List from an Array
46	PHP Program to Check for Empty String
47	PHP Program to Append a String
48	PHP Program to Remove All White Spaces from a String
49	PHP Program to Converting String to Date and DateTime
50	PHP Program to Count the Number of Words in a String
51	PHP Program to Convert String to Boolean
52	PHP Program to Get a Variable Name as a String
53	PHP Program to Convert DateTime to String
54	PHP Program to Remove New Lines from String
55	PHP Program to Get String Between Two Characters
56	PHP Program to Remove White Spaces from Beginning/End of a String
57	PHP Program to Check if All Characters are Lowercase
58	PHP Program to Removing Occurrences of a Specific Character from End of a String
59	PHP Program to Convert Lowercase String to Uppercase
60	PHP Program to Convert First Character of All Words Uppercase
61	PHP Program to Find the Number of Sub-string Occurrences
62	PHP Program to Create a String by Joining the Array Elements

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