PHP examples: Strings

Operations with strings


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Using PHP string functions
Author: Elena Machkasova elenam@morris.umn.edu
Last modified: 3/13/08
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Using PHP string functions
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<h2>Some things you can do with strings</h2>
<?php
$str1 = "apples";
$str2 = "bananas and oranges";
print "<h3>Finding the length of a string</h3>\n";
print "<p>\n";
print "String \"$str1\" has ".strlen($str1)." characters<br/>\n";
print "String \"$str2\" has ".strlen($str2)." characters<br/>\n";
print "</p>\n";

print "<h3>Finding which sring is first in \"alphabetical\" order</h3>\n";

print "<p>\n";
if (strcmp($str1, $str2) < 0) {
	print "\"$str1\" is before \"$str2\" in alphabetical order<br/>\n";	
} else {
	print "\"$str2\" is before \"$str1\" in alphabetical order<br/>\n";		
}

$str3 = "Kiwi";
if (strcmp($str1, $str3) < 0) {
	print "\"$str1\" is before \"$str3\" in alphabetical order<br/>\n";	
} else {
	print "\"$str3\" is before \"$str1\" in alphabetical order<br/>\n";		
}
print "</p>\n";

print "<h3>Finding if strings are equal</h3>\n";
print "<p>\n";
$str3 = "apples";
if (strcmp($str1,$str3) == 0) {
	print "\"$str1\" and \"$str3\" are the same - Duh!<br/>\n";	
}
$str3 = "Apples";
if (strcmp($str1,$str3) == 0) {
	print "\"$str1\" and \"$str3\" are the same<br/>\n";	
} else {
	print "But \"$str1\" and \"$str3\" are different<br/>\n";
}
print "Comparing with strcasecmp:<br/>\n";
if (strcasecmp($str1,$str3) == 0) {
	print "\"$str1\" and \"$str3\" are the same<br/>\n";	
} else {
	print "But \"$str1\" and \"$str3\" are different<br/>\n";
}
print "</p>\n";

print "<h3>More stuff you can do with strings</h3>\n";

print "<p>\n";
$str4 = strtoupper($str1);
print "$str4 is the uppercase version of $str1<br/>\n";
$str5 = ucfirst($str2);
$str6 = ucwords($str2);
print "Capitalized the first letter in string: $str5<br/>\n";
print "Capitalized the first letter in all words: $str6<br/>\n";
print "The string itself didn't change: $str2<br/>\n";
print "</p>\n";
?>
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http://rynite.morris.umn.edu/~elenam/1101_spring08/strings/strings.php
UMM CSci 1101