How to query the location of the first element by php

This article shows you how to query the location of the first element by php. The content is concise and easy to understand, which will definitely brighten your eyes. I hope you can get something through the detailed introduction of this article.

Php query the location of the first element: 1, create a new php file; 2, enter the code "$str = 'abcdef';"; 3, use the strpos () function to find the location of the character "a" for the first time.

This article operating environment: Windows7 system, PHP7.1 version, Dell G3 computer.

How does php query the location of the first element?

Find where the string first appears:

Create a new index.php file, as shown below:

Declare the file types and encodings that PHP interacts with the browser, as shown in the figure:

Enter the code: $str = 'abcdef'

Use the strpos () function to find the first occurrence of the character'a', as shown in the figure:

Use the var_dump () function to output the return value of $pos, as shown in the figure:

Running the web page, you can see that the index value of the character'a' is 0, as shown in the figure:

The above is how php queries the location of the first element. Have you learned any knowledge or skills? If you want to learn more skills or enrich your knowledge reserve, you are welcome to follow the industry information channel.