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Check for alphanumeric character (s) ctype_alnum (PHP 4 >= 4.0.4, PHP 5, PHP 7, PHP 8) ctype_alnum — Check for alphanumeric character (s)
- Parameters
- Return Value
- Example 3
This function accepts the following parameters − 1. text (required)− A string needs to be checked (or tested).
This function returns 'true', if every character in the text is either a letter or a digit, 'false' otherwise.
Checking multiple strings (texts). In the following example, we declare an array containing multiple texts and will check each string to determine whether they are alphanumeric using the ctype_alnum()function −
Dec 31, 2023 · PHP ctype_alnum () function: In this tutorial, we will learn about the PHP ctype_alnum () function with its usage, syntax, parameters, return value, and examples.
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Introduction to ctype_alnum() function in PHP, which checks if all characters in a string are alphanumeric. Learn its usage and significance in data validation.
Description bool ctype_alnum ( string text) Returns TRUE if every character in text is either a letter or a digit, FALSE otherwise. In the standard C locale letters ...
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PHP Manual Function Reference Variable and Type Related Extensions Ctype Ctype Functions ctype_alnum Ctype Functions ctype_alnum ctype_alpha ctype_cntrl ctype_digit ctype_graph ctype_lower ctype_print ctype_punct ctype_space ctype_upper ctype_xdigit Ctype Functions ctype_alpha ctype_alnum (PHP 4 >= 4.0.4, PHP 5)
