<?php
 
$s = "acesta este un text";
$sir = "stiu PHP stiu HTML stiu CSS";
 
# inlocuirea unor secvente
print str_replace( "stiu", "invat", $sir); // invat PHP invat HTML invat CSS
 
print "\n";
# schimb tipul literelor (mari, mici)
echo strtoupper( $s ), "\n"; // ACESTA ESTE UN TEXT
echo strtolower( $sir ), "\n"; // stiu php stiu html stiu css
echo ucfirst( $s ), "\n"; // Acesta este un text
echo ucwords( $s ), "\n"; // Acesta Este Un Text
 
print "\n";
# sterg spatiile de la inceput si sfarsit: trim, ltrim, rtrim
print trim('      ok        '); // ok
 
print "\n";
# caractere "enter" transformate in <br />
print nl2br( "acesta e afisat pe \n 2 linii" ); // acesta e afisat pe <br /> 2 linii
 
?>
 

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