title: Why doesn't this code simply print letters A to Z?
body: <pre><code>&lt;?php
  for ($i = 'a'; $i &lt;= 'z'; $i++)
      echo "$i\n";
  </code></pre>
  
  <p>This snippet gives the following output (newlines are replaced by spaces):</p>
  
  <blockquote>
    <p>a b c d e f g h i j k l m n o p q r s t u v w x y z aa ab ac ad ae af ag ah ai aj ak al am an ao ap aq ar as at au av aw ax ay az ba bb bc bd be bf bg bh bi bj bk bl bm bn bo bp bq br bs bt bu bv bw bx by bz ca cb cc cd ce cf cg ch ci cj ck cl cm cn co cp cq cr cs ct cu cv cw cx cy cz da db dc dd de df dg dh di dj dk dl dm dn do dp dq dr ds dt du dv dw dx dy dz ea eb ec ed ee ef eg eh ei ej ek el em en eo ep eq er es et eu ev ew ex... on to yz</p>
  </blockquote>