PHP String Functions: A Complete Guide
Tags: phppractices, php
Published: 2023-01-05 17:39:13

---
title: PHP String Functions: A Complete Guide
published: true
date: 2023-01-02 19:38:50 UTC
tags: PHPPractices,php
canonical_url: https://larachamp.com/php-string-functions-a-complete-guide/
---

Are you working with strings in PHP and looking for ways to manipulate them? PHP provides a variety of built-in functions that can help you do just that. In this post, we’ll go over some of the most common string functions in PHP and how they can be used.

[![PHP String Functions: A Complete Guide](https://larachamp.com/wp-content/uploads/2023/01/Yellow-Bright-Business-Idea-Tutorial-Youtube-Thumbnail-2.png)](https://larachamp.com/php-string-functions-a-complete-guide/)

1. `strlen`: This function returns the length of a string. For example:

```
$str = "Hello world";
echo strlen($str); // Outputs "11"

```

1. `strtolower`: This function converts a string to lowercase. For example:

```
$str = "HELLO WORLD";
echo strtolower($str); // Outputs "hello world"

```

1. `strtoupper`: This function converts a string to uppercase. For example:

```
$str = "hello world";
echo strtoupper($str); // Outputs "HELLO WORLD"

```

1. `substr`: This function returns a portion of a string. It takes two arguments: the string and the start and end indices (inclusive). For example:

```
$str = "Hello world";
echo substr($str, 0, 5); // Outputs "Hello"

```

`str_replace`: This function replaces all occurrences of a search string with a replacement string. It takes three arguments: the search string, the replacement string, and the original string. For example:

```
$str = "Hello world";
echo str_replace("world", "PHP", $str); // Outputs "Hello PHP"

```

1. `strpos`: This function returns the position of the first occurrence of a search string. It takes two arguments: the search string and the original string. For example:

```
$str = "Hello world";
echo strpos($str, "world"); // Outputs "6"

```

1. `strtr`: This function translates certain characters in a string. It takes two arguments: the original string and an array of translations. For example:

```
$str = "Hello world";
echo strtr($str, array("world" => "PHP")); // Outputs "Hello PHP"
```

1. `htmlspecialchars`: This function converts special characters to HTML entities. This is useful for displaying text on a web page, as the special characters will be displayed as-is instead of being interpreted as HTML. For example:

```
$str = "<p>This is a paragraph</p>";
echo htmlspecialchars($str); // Outputs "<p>This is a paragraph</p>"

```

1. `nl2br`: This function inserts HTML line breaks before all newlines in a string. This is useful for displaying text with line breaks on a web page. For example:

```
$str = "This is a paragraph\nThis is another paragraph";
echo nl2br($str); // Outputs "This is a paragraph<br>This is another paragraph"
```

1. `trim`: This function removes whitespace from the beginning and end of a string. For example:

```

$str = " Hello world ";
echo trim($str);

```

These are the some basic string functions in PHP, I hope it will help. Thanks [Larachamp](https://larachamp.com/)

The post [PHP String Functions: A Complete Guide](https://larachamp.com/php-string-functions-a-complete-guide/) appeared first on [Larachamp](https://larachamp.com).