WebSep 9, 2014 · In order to make sure no code can be inserted I wanted to use ctype_alnum to validate all table names (after removing underscores) that come into the database module to shield the application from errors in other parts. WebCtype Functions Table of Contents. ctype_alnum — Check for alphanumeric character(s); ctype_alpha — Check for alphabetic character(s); ctype_cntrl — Check for control character(s); ctype_digit — Check for numeric character(s); ctype_graph — Check for any printable character(s) except space; ctype_lower — Check for lowercase character(s); …

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Webctype_digit () will treat all passed integers below 256 as character-codes. It returns true for 48 through 57 (ASCII '0'-'9') and false for the rest. ctype_digit (5) -> false ctype_digit (48) -> true ctype_digit (255) -> false ctype_digit (256) -> true (Note: the PHP type must be an int; if you pass strings it works as expected) up down WebJul 25, 2010 · In your case use ctype_alnum, example: if (ctype_alnum($str)) { //... } Example: bitcoin kicks

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WebAs of PHP 8.1.0, passing a non-string argument is deprecated. In the future, the argument will be interpreted as a string instead of an ASCII codepoint. Depending on the intended behavior, the argument should either be cast to string or … http://duoduokou.com/php/69087687692319174183.html WebMar 15, 2024 · php中Ctype函数用法详解，phpctype函数详解_PHP教程：php中Ctype函数用法详解，phpctype函数详解本文实例分析了php中Cty? 爱问知识人 爱问共享资料 医院库 您好！ bitcoin just crashed