How to query the position of the first element in php

How to query the position of the first element in php: 1. Create a new php file; 2. Enter the code "$str = 'abcdef';"; 3. Use the strpos() function to find the character "a "The location where it first appears is sufficient.

#The operating environment of this article: Windows 7 system, PHP version 7.1, Dell G3 computer.

How to query the position of the first element in php?

Find the position where the string first appears:

Create a new index.php file, as shown in the figure:

Declare the file type and encoding for PHP to interact with the browser, as shown in the figure:

Input code: $str = 'abcdef';

Use the strpos() function to find the position where the character 'a' first appears, as shown in the figure:

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

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

Recommended learning: "PHP Video Tutorial"

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