ctype_punct to validate punctuation character in PHP

Check punctuation with ctype_punct()

ctype_punct() returns true only when every character is punctuation, with no letters, digits, or whitespace.

$value = '!?.,';
var_dump(ctype_punct($value));

$var=&quot;$)@*&quot;; // All are punctuation character(s)
//$var="^#(b!"; //  All or some are NOT punctuation character(s)

if(ctype_punct($var)){
	echo &quot;&lt;b&gt;$var&lt;/b&gt; All are punctuation character(s)&quot;;
}else{ 
	echo &quot; &lt;b&gt;$var&lt;/b&gt; All or some are NOT punctuation character(s)&quot;;
}

Output

<b>$)@*b> All are punctuation character(s)

Syntax

bool ctype_punct ( string $input_string )

$input_string : String to be checked.

ctype_punct() is a PHP filter function checks if only punctuation characters present in the $input_string ( nither letter, digit or blank space ). Any thing other than this if present then it returns FALSE.

Output is TRUE of all punctuation character(s) only present. ( neither letter, digit or blank space )

$str = array("#$)s", "$@!&)(", "2*;^@",38);
foreach ($str as $val) {
if (ctype_punct($val)) {
echo "<p class='text-success'>The string <b>$val</b> consists of all punctuation character(s).</p>";
} else {
echo "<p class='text-danger'>The string <b>$val</b> does not consist of all punctuation character(s)</p>";
}
}

Output is here

<p class='text-danger'>The string <b>#$)s does not consist of all punctuation character(s)
The string $@!&)( consists of all punctuation character(s).
The string 2*;^@ does not consist of all punctuation character(s)
The string 38 consists of all punctuation character(s).

Check for only alphabetic characters by ctype_alpha() Check for all lower or upper Check for at least one lower case or upper case
ctype()

Subhendu Mohapatra

Author & Instructor at plus2net

I write and maintain practical tutorials on Python, PHP, SQL, JavaScript, HTML, jQuery, and web development at plus2net. The tutorials focus on clear explanations, working examples, and code that readers can test and adapt while learning.

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ctype_punct to check punctuation character

Check punctuation with ctype_punct()

Subhendu Mohapatra