Use [] for array offsets

Author: thekid

src/main/php/math/BigFloat.class.php

@@ -82,7 +82,7 @@ public function power($other) {
   public function ceil() {
     return new self(false === strpos($this->num, '.') 
       ? $this->num 
-      : ('-' === $this->num{0} ? bcsub($this->num, 0, 0) : bcadd($this->num, 1, 0))
+      : ('-' === $this->num[0] ? bcsub($this->num, 0, 0) : bcadd($this->num, 1, 0))
     );
   }
 
@@ -94,7 +94,7 @@ public function ceil() {
   public function floor() {
     return new self(false === strpos($this->num, '.') 
       ? $this->num 
-      : ('-' === $this->num{0} ? bcsub($this->num, 1, 0) : bcadd($this->num, 0, 0))
+      : ('-' === $this->num[0] ? bcsub($this->num, 1, 0) : bcadd($this->num, 0, 0))
     );
   }
 
@@ -111,7 +111,7 @@ public function round($precision= 0) {
     $a= '0.'.str_repeat('0', $precision).'5';
     return new self(false === strpos($this->num, '.') 
       ? $this->num 
-      : ('-' === $this->num{0} ? bcsub($this->num, $a, $precision) : bcadd($this->num, $a, $precision))
+      : ('-' === $this->num[0] ? bcsub($this->num, $a, $precision) : bcadd($this->num, $a, $precision))
     );
   }
 }

src/main/php/math/BigInt.class.php

@@ -267,7 +267,7 @@ protected static function fromBytes($bytes) {
     $bytes= str_pad($bytes, $len, "\0", STR_PAD_LEFT);
     $self= new self(0);
     for ($i= 0; $i < $len; $i+= 4) {
-      $self->num= bcadd(bcmul($self->num, '4294967296'), 0x1000000 * ord($bytes{$i}) + current(unpack('N', "\0".substr($bytes, $i+ 1, 3))));
+      $self->num= bcadd(bcmul($self->num, '4294967296'), 0x1000000 * ord($bytes[$i]) + current(unpack('N', "\0".substr($bytes, $i+ 1, 3))));
     }      
     return $self;
   }